Leased Lines London 2026: Compare Costs, Providers, DIA & Installation Quick answer
A leased line in London gives your business a dedicated, uncontended internet connection with symmetrical upload and download speeds, stronger service guarantees and more reliable performance than standard business broadband.
London leased line prices typically start from around £150-£300+ per month for entry-level dedicated connectivity, with 1Gbps leased lines often costing £250-£600+ per month and 10Gbps leased lines costing £800-£2,000+ per month , depending on postcode, bearer, building, installation, contract length, SLA and provider.
As a simple guide:
London leased line option Typical monthly cost guide
100Mbps leased line
£150-£300+
Small offices, clinics, agencies and VoIP-heavy SMEs
200Mbps leased line
£180-£350+
Growing teams needing more capacity
500Mbps leased line
£220-£450+
Cloud-heavy offices and creative teams
1Gbps leased line
£250-£600+
Larger offices, SaaS firms, call centres and multi-user sites
10Gbps leased line
£800-£2,000+
Data-heavy, enterprise, media, fintech and multi-site businesses
100Gbps DIA or high-capacity service
Quote-based
Data centres, enterprise, carriers and very high-bandwidth users
Leased line with 4G/5G backup
Add-on cost
Shops, clinics, offices and payment-critical premises
Diverse circuit or resilient leased line
Quote-based
Businesses that cannot trade offline
London has strong leased line availability, but the best provider and price vary by exact building.
You should compare quotes if your business needs guaranteed bandwidth, stable VoIP, large uploads, cloud software, secure remote access, multiple users or stronger uptime protection.
Compare Leased Line Quotes in London
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Compare leased line quotes in London Use this guide if you are comparing:
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Ethernet leased line London
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leased line costs London
business internet London
leased line vs FTTP
leased line vs business broadband
Colt leased lines London
BT leased lines London
Virgin Media Business leased lines London
Vodafone leased lines London
Neos Networks leased lines London
How do we work?
Transparent, impartial, and data‑driven reviews made by a team of expert humans, never AI generated – here’s exactly how Compare Your Business Costs helps you find the best deals from trusted UK providers: click here
Authored by: Ally Cox (Business Technology & B2B Services Specialist 10+ Years’ Experience)
Reviewed by: James Ward (Telecoms Specialist, 12+ Years Experience)
Last Updated: August 2026
Leased Line Cost Calculator UK Estimate your monthly leased line cost, annual spend, total contract value and whether dedicated internet is likely to be worth comparing for your business.
Required leased line speed
100Mbps 200Mbps 500Mbps 1Gbps 2Gbps 10Gbps Choose the committed speed your business needs.
Bearer size
100Mbps bearer 1Gbps bearer 10Gbps bearer A larger bearer can make future speed upgrades easier.
Business usage
Standard office use VoIP, video calls and cloud software Heavy uploads, backups or large files Critical operations / cannot trade offline Enterprise, data-heavy or multi-site Higher usage may increase recommended resilience and speed.
Location type
City / strong network availability Town / mixed availability Rural / limited availability Business park / complex install Leased line pricing is highly postcode-specific.
Contract length
12 months 24 months 36 months 60 months Longer contracts usually reduce the monthly price.
Resilience requirement
No extra resilience 4G/5G or broadband backup Diverse backup circuit Useful if downtime would stop trading.
SLA requirement
Standard business SLA Enhanced SLA / faster fix Critical SLA / maximum uptime focus Higher SLA expectations can affect provider choice.
Your estimated leased line cost
Estimated monthly cost
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Estimated cost per Mbps
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Recommended option
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Difference vs broadband
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This calculator is an estimate only. Actual leased line costs vary by postcode, network availability, bearer size, contract length, installation, excess construction charges, SLA, resilience, provider and survey results.
Contents:
London Leased Line Providers
Leased Line Costs in London
Installation Times for Leased Lines in London
Benefits of Leased Lines London
Leased Lines vs Fibre Optic Broadband
Installation Times for Leased Lines in London
Case Study: Herbal Hill Office Building
Leased Lines in London Conclusion
Key takeaways
London leased lines are dedicated business internet connections with symmetrical upload and download speeds.
Prices are highly postcode-specific and depend on bearer, bandwidth, contract, building access and installation work.
Typical London leased line costs start from around £150-£300+ per month , but larger circuits can cost much more.
1Gbps leased lines are a common option for growing London offices, creative firms, finance teams, call centres and cloud-heavy businesses.
10Gbps leased lines are usually for enterprise, media, data-heavy, fintech, SaaS, multi-site or high-capacity operations.
Installation often takes around 30-90+ days , but wayleaves, building access and civil works can extend timelines.
Serviced offices, multi-tenant buildings and managed premises may need landlord or freeholder approval.
FTTP full fibre is cheaper and suitable for many SMEs, but it is not the same as a dedicated leased line.
Businesses relying on VoIP, cloud systems, large uploads, payments or remote access should compare SLA, fix time and backup options.
London businesses should compare leased line quotes by exact postcode, not just by provider name.
What Is a Leased Line? A leased line is not shared in the same way with neighbouring users.
A leased line usually gives you:
dedicated bandwidth
symmetrical upload and download speeds
uncontended connectivity
stronger service level agreements
more predictable performance
lower contention risk
better upload performance
business-grade resilience options
static IP options
support for VoIP, cloud and critical systems
Leased lines are also known as:
dedicated internet access
DIA
dedicated leased lines
Ethernet leased lines
fibre leased lines
Ethernet internet
business Ethernet
uncontended business internet
A leased line is not the same as FTTP, SOGEA or standard business broadband – those services may be fast, but they do not usually provide the same dedicated bandwidth or SLA structure.
Why London businesses compare leased lines London businesses often rely on connectivity for daily operations, and having a leased line can support:
VoIP phone systems
Microsoft Teams and video calls
cloud software
CRM systems
file uploads
financial systems
secure remote access
payment systems
EPOS
guest Wi-Fi
CCTV
backup and disaster recovery
multi-site connectivity
VPNs
hosted desktops
large creative files
real-time data
client portals
ecommerce operations
Leased lines are especially relevant for:
City of London finance and legal firms
Canary Wharf offices and fintech businesses
Shoreditch, Old Street and Hackney tech firms
Soho, Fitzrovia and Camden creative agencies
Westminster and Victoria offices
Southwark, London Bridge and Waterloo professional services firms
clinics and healthcare providers
call centres and support teams
coworking and serviced office operators
media, production and post-production businesses
hospitality groups and multi-site operators
data-heavy or cloud-native companies
Leased Lines London Providers
Provider Why compare it?
BT Business
Established leased line and dedicated internet provider
Price, SLA, bearer options, install lead time and contract
Virgin Media Business
Dedicated Internet Access and high-capacity options where available
Coverage, SLA, installation, upload speed and resilience
Colt Technology Services
Strong business connectivity and high-capacity DIA options
Network availability, pricing, service level and contract
Vodafone Business
Business connectivity, leased lines and managed network options
Availability, SLA, resilience and support model
TalkTalk Business
Business connectivity and Ethernet options
Pricing, support, SLA and installation route
Managed business connectivity and telecoms support
Contract terms, support, installation and managed services
Neos Networks
Business connectivity and high-capacity network services
Coverage, bearer options and enterprise fit
Zayo
High-capacity fibre and enterprise connectivity
Availability and suitability for larger circuits
Lumen
Enterprise networking and connectivity
Enterprise requirements and UK availability
GTT
Global and enterprise connectivity options
Multi-site, international and network requirements
euNetworks
European bandwidth infrastructure and high-capacity connectivity
Central London and enterprise-grade availability
Focus Group / managed telecoms providers
Managed connectivity, VoIP and business telecoms support
Support, bundles, SLAs and contract terms
Specialist leased line brokers
Can compare multiple network options
Which provider supplies the circuit and what terms apply
This is not a fixed ranking – the best provider depends on your postcode, building, speed, SLA, installation requirements and whether you need resilience.
Leased Line Costs in London London leased line pricing varies by postcode, building and circuit requirement.
Speed Typical monthly cost guide
100Mbps
£150-£300+
Small offices, VoIP-heavy SMEs and clinics
200Mbps
£180-£350+
Growing teams and cloud-based businesses
500Mbps
£220-£450+
Agencies, professional services and larger offices
1Gbps
£250-£600+
Data-heavy SMEs, call centres, SaaS and multi-user sites
2Gbps
£500-£900+
Larger offices and high-capacity users
10Gbps
£800-£2,000+
Enterprise, media, fintech and data-heavy operations
100Gbps
Quote-based
Data centres, carriers and enterprise users
These are guide prices only.
Actual prices depend on:
your exact London postcode
distance to fibre
bearer size
committed bandwidth
provider network availability
contract length
installation complexity
excess construction charges
wayleave requirements
SLA requirements
resilience requirements
managed router
static IPs
backup circuits
number of sites
Compare 100Mb, 1Gb and 10Gb London Leased Line Quotes
Free quotes • No obligation • Compare provider pricing
Best London leased line option by business type
Business type Best option to compare Why
Small office
100Mbps or 200Mbps leased line
Stable bandwidth and VoIP support
Growing SME
200Mbps, 500Mbps or 1Gbps leased line
More users, cloud tools and uploads
Creative agency
500Mbps or 1Gbps leased line
Large file uploads and video collaboration
Finance or legal firm
1Gbps leased line with backup
Uptime, security and reliable cloud access
Clinic or healthcare provider
100Mbps-1Gbps leased line
Cloud systems, bookings and secure access
Call centre
1Gbps leased line with resilience
VoIP uptime and call quality
SaaS or tech business
1Gbps or 10Gbps leased line
Cloud systems and data-heavy workflows
Media or production company
1Gbps-10Gbps leased line
Large uploads, transfers and collaboration
Serviced office
1Gbps-10Gbps leased line
Multiple tenants and heavy shared usage
Coworking space
1Gbps leased line or higher
High user density and guest Wi-Fi
Multi-site business
Managed leased line network or SD-WAN
Consistency across locations
Data-heavy enterprise
10Gbps or 100Gbps DIA
High-capacity dedicated connectivity
Shop or restaurant
FTTP with backup, or leased line if critical
Payments, EPOS and guest Wi-Fi resilience
Installation Times for Leased Lines in London London leased line installation often takes around 30-90+ days .
Installation can be faster or slower depending on:
existing fibre near the building
provider network availability
survey results
landlord or freeholder approval
wayleave paperwork
access to comms rooms
internal cabling requirements
civil engineering work
blocked ducts
roadworks or permits
excess construction charges
building management delays
whether resilience or diverse routing is required
Benefits of Leased Lines London Leased lines provide:
Symmetrical upload/download speeds which is perfect for VoIP, large data uploads, and streaming. No bandwidth sharing – performance stays consistent.Guaranteed uptime – backed by SLAs (99.9–100%). Scalable bandwidth – easily upgrade from 100 Mbps to 10 Gbps.Enhanced security – private connection, ideal for GDPR compliance.
Leased Lines vs. FTTP
Feature FTTP business broadband
Monthly cost
Lower
Download speed
Fast
Fast and guaranteed by package
Upload speed
Varies by provider/package
Dedicated bandwidth
No
Yes
Contention
Shared network
SLA
Varies
Installation
Usually faster if available
Wayleave risk
Possible
Best for
Most SMEs
Mission-critical and data-heavy businesses
Typical cost
£30-£60+
What affects leased line pricing in London? Postcode and network availability London has strong fibre infrastructure, but not every building has the same provider options.
Two offices in the same borough can receive very different leased line quotes.
Building access Offices in managed buildings, listed buildings, serviced offices or multi-tenant premises may need access approval.
Wayleave requirements Wayleave delays are common in London commercial buildings.
Bearer size A bearer is the maximum capacity of the circuit.
For example, you might buy:
100Mbps on a 100Mbps bearer
100Mbps on a 1Gbps bearer
1Gbps on a 1Gbps bearer
1Gbps on a 10Gbps bearer
10Gbps on a 10Gbps bearer
A larger bearer may cost more but can make future upgrades easier.
Contract length 36-month and 60-month contracts may reduce monthly pricing compared with shorter contracts.
Excess construction charges If extra engineering work is needed, the provider may quote excess construction charges.
SLA and fix time More demanding service requirements may affect provider choice and cost.
Resilience A single leased line is strong, but it is still one route – if you cannot afford downtime you might need:
4G/5G backup
FTTP backup
second leased line
diverse routing
failover router
managed firewall
SD-WAN
Leased line vs business broadband
Question If yes, compare leased lines
Would downtime stop your business trading?
Yes
Do you use VoIP heavily?
Yes
Do you upload large files daily?
Yes
Do many staff use cloud systems at once?
Yes
Do you need guaranteed upload speed?
Yes
Do you run a call centre or support desk?
Yes
Do you need strong SLA/fix-time guarantees?
Yes
Do you need multiple static IPs?
Possibly
Do you operate from several sites?
Possibly
Is your current broadband unreliable?
Possibly
London wayleaves and building access Wayleaves are one of the biggest causes of delay for London leased line installations, so a wayleave could be needed if:
you lease your office
the building has a landlord or freeholder
fibre must pass through common areas
equipment must be installed in a comms room
the provider needs access to ducts, risers or external walls
the premises is in a managed building
you operate from a serviced office
the building is listed or heritage-sensitive
multiple tenants share the same infrastructure
Before ordering, ask:
who owns the building?
who signs wayleave documents?
is the building manager responsive?
is there an existing fibre provider in the building?
is there a comms room?
does the landlord allow new fibre installations?
are there any access restrictions?
does your provider manage wayleave chasing?
A low monthly quote can be delayed if building permission is slow.
Resilience and backup for London leased lines A leased line improves reliability, but it does not remove every outage risk.
If your business cannot trade offline, compare backup options.
Resilience option Best for
4G/5G backup
Shops, cafés, clinics and smaller offices
Lower-cost failover option
FTTP backup
Offices and cloud users
Useful where FTTP is available
Second broadband line
SMEs wanting lower-cost resilience
Should ideally use a different network
Second leased line
Uptime-critical businesses
Higher cost but stronger resilience
Diverse routing
Finance, healthcare, call centres and enterprise
Reduces single-route dependency
SD-WAN
Multi-site businesses
Helps manage multiple connections
Managed firewall/router
Security and failover control
Useful for critical operations
100Mbps, 1Gbps or 10Gbps leased line?
Speed Best for
100Mbps
Small offices, VoIP, cloud software and secure access
User count, VoIP calls and backup
200Mbps
Growing teams and cloud-heavy SMEs
Upload demand and contract length
500Mbps
Agencies, clinics, professional services and larger offices
Large files and concurrent users
1Gbps
Call centres, SaaS, finance, media and multi-user offices
Bearer size and future upgrades
2Gbps
High-capacity offices and heavier data use
10Gbps
Enterprise, media, fintech and high-data operations
Installation, resilience and SLA
100Gbps
Data centres, carriers and enterprise users
Specialist DIA, wavelength or high-capacity Ethernet
1Gb leased line London A 1Gb leased line is one of the most common options for larger London SMEs and data-heavy offices, great for:
creative agencies
media firms
fintech businesses
legal firms
accountancy firms
multi-user offices
call centres
SaaS companies
clinics
coworking spaces
businesses with large uploads
teams using cloud systems all day
10Gb leased line London A 10Gb leased line is usually for businesses with heavy data requirements, perfect for:
enterprise offices
data-heavy fintech firms
media production companies
post-production studios
SaaS platforms
high-density serviced offices
research organisations
cloud-heavy operations
multi-site networks
businesses with large backup or replication needs
100Gb leased line and high-capacity DIA in London Some London businesses may need 100Gbps-level connectivity or high-capacity DIA – this is usually not a standard SME leased line.
data centres
carriers
cloud providers
enterprise networks
financial trading environments
media distribution
research organisations
very high-capacity multi-site networks
Questions to ask before choosing a London leased line Before signing a contract, ask:
what speed is committed?
what bearer size is included?
can I upgrade during the contract?
what is the monthly cost?
what is the installation cost?
are excess construction charges possible?
what contract length applies?
what SLA is included?
what fix-time target applies?
is a managed router included?
are static IPs included?
is backup included?
is 4G/5G failover available?
can you provide diverse routing?
do I need a wayleave?
who manages wayleave paperwork?
how long is installation expected to take?
what happens if installation is delayed?
what happens at contract renewal?
what are the early termination charges?
is VAT included or excluded?
Common mistakes to avoid Avoid these mistakes when comparing London leased lines:
choosing only by monthly price
not checking bearer size
ignoring excess construction charges
not planning for wayleave delays
assuming every provider can serve every building
choosing too much speed and overpaying
choosing too little speed and needing an upgrade quickly
not comparing FTTP as a cheaper alternative
not comparing backup options
relying on one connection for critical operations
not checking SLA and fix-time details
forgetting static IP requirements
overlooking router or firewall costs
signing a long contract without checking upgrade terms
ordering too late before an office move
not checking whether installation costs are waived over longer contracts
Final verdict London is one of the strongest UK markets for leased line availability, but pricing and installation still vary heavily by postcode, building and provider network.
For most small businesses, FTTP or high-quality business broadband should be compared first.
For businesses where internet performance directly affects trading, productivity or client service , a leased line will be worth the extra cost.
A London leased line is most suitable if your business needs:
dedicated bandwidth
symmetrical upload and download
stronger SLA
stable VoIP
reliable cloud access
large file uploads
secure remote access
static IPs
multi-user performance
backup and resilience
multi-site connectivity
The best approach is to compare leased line quotes using:
exact postcode
building type
required speed
bearer size
SLA needs
wayleave requirements
backup options
contract length
installation cost
total contract value
Compare Leased Line Quotes in London
Free quotes • No obligation • Compare dedicated internet providers
FAQs About Leased Lines in London How much does a leased line cost in London?
A London leased line typically costs around £150-£300+ per month for entry-level dedicated connectivity. 1Gbps leased lines often cost around £250-£600+ per month, while 10Gbps circuits can cost £800-£2,000+ per month depending on postcode, bearer, contract and installation.
What is the cheapest leased line in London?
The cheapest leased line depends on your building, postcode, speed and contract term. A 100Mbps leased line is usually cheaper than 1Gbps or 10Gbps, but FTTP may be a better-value option for some SMEs.
How long does leased line installation take in London?
Leased line installation in London often takes around 30-90+ days. Wayleaves, landlord approval, civil works, blocked ducts and building access can extend installation times.
Which providers offer leased lines in London?
Providers to compare include BT Business, Virgin Media Business, Colt, Vodafone Business, TalkTalk Business, Daisy Communications, Neos Networks, Zayo, Lumen, GTT, euNetworks, Focus Group and specialist leased line brokers.
Is a leased line better than FTTP?
A leased line is better if you need dedicated bandwidth, symmetrical speeds, stronger SLAs and more predictable performance. FTTP is usually cheaper and may be enough for many small businesses.
Is a leased line worth it for a small London business?
A leased line can be worth it if downtime would stop your business trading, if you use VoIP heavily, upload large files, rely on cloud systems or need stronger service guarantees. Otherwise, compare FTTP first.
Can I get a 1Gb leased line in London?
Yes, 1Gb leased lines are commonly available in many London business areas, but availability and pricing depend on the exact postcode and building.
Can I get a 10Gb leased line in London?
Yes, 10Gb leased lines are available from selected providers in suitable London locations. Pricing is usually quote-based and depends on network availability, bearer, installation and resilience needs.
Can I get a 100Gb leased line in London?
Some providers offer high-capacity DIA, Ethernet or specialist connectivity up to 100Gbps where available. This is usually for enterprise, data centres, carriers and very high-bandwidth users rather than standard SMEs.
What is DIA?
DIA stands for Dedicated Internet Access. It is another term often used for a leased line or dedicated business internet connection.
What is a leased line bearer?
A bearer is the maximum capacity of the physical circuit. For example, you might buy 100Mbps service on a 1Gbps bearer so you can upgrade bandwidth later.
What is a wayleave?
A wayleave is permission from a landlord, freeholder or building owner to install telecoms infrastructure. It is common in leased or multi-tenant London offices.
Do leased lines include static IPs?
Many leased line providers include static IPs or offer them as an add-on. Check how many are included and whether extra IPs cost more.
Do I need backup with a leased line?
If downtime would stop trading, backup is worth comparing. Options include FTTP backup, 4G/5G failover, a second leased line, diverse routing or SD-WAN.
Can leased lines support VoIP?
Yes. Leased lines are well suited to VoIP because they provide stable, symmetrical and dedicated bandwidth.
Are leased lines secure?
A leased line is a dedicated connection, but you still need suitable cybersecurity, firewall, router and access controls. Do not rely on the circuit alone for security.
Can I switch leased line providers?
Yes, but leased line contracts often run 12, 24, 36 or 60 months. Check your renewal date, notice period and early termination fees before switching.
Should I compare leased lines before moving office?
Yes. Check availability, installation time, wayleave requirements and potential excess construction charges before signing an office lease.
Compare leased line provider quotes →
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Hi, I’m Ally Cox , a senior copywriter and blogger at CompareYourBusinessCosts.co.uk, the UK’s trusted platform for comparing business services.over a decade of experience in the B2B sector, I specialise in simplifying complex topics like leased lines, VoIP, business energy, HR and payroll solutions, accounting software, and EPOS systems .HR, copywriting, and business operations- from clocking-in systems to card machines and office technology .informed, confident decisions when choosing products and services that improve efficiency and save money.
