Looking for the best 100Gb leased line providers in the UK in 2025? We’ve analysed the top providers offering ultra-fast, enterprise-grade leased lines with symmetrical speeds and 99.99% uptime guarantees. Whether you operate a data centre, a fintech firm, or a high-traffic online business, this guide helps you compare the most reliable and competitively priced 100Gbps leased line services across the UK. Discover which providers deliver the best value, fastest installation times, and strongest service-level agreements.
1. BT Wholesale
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Excellent national coverage
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Strong on SLAs and fault response
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Pricing is competitive in urban areas
2. Colt Technology
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High-capacity metro fibre in city hubs
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Great for multi-site and international firms
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Fast install times in on-net buildings
3. Vorboss
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Carrier-grade fibre backbone
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Scalable and priced well for high-commit customers
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Deep coverage in the London regions
Other Providers Worth Considering:
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Virgin Media Business – good regional pricing
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Neos Networks – strong for managed service and SLAs
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TalkTalk Business – selective but cost-effective in key zones
Frequently Asked Questions
1. What is a 100Gb leased line?
A 100Gb leased line is a dedicated, high-speed fibre optic connection offering 100 gigabits per second symmetrical bandwidth. It’s designed for large enterprises needing consistent, uncontended, and ultra-fast internet.
2. How much does a 100Gb leased line cost in the UK in 2025?
In 2025, prices for 100Gb leased lines in the UK range from £4,000 to over £20,000/month, depending on location, contract length, provider, and required uptime SLAs.
3. Which providers offer 100Gb leased lines in the UK?
Top providers include Connect2, BT, Colt, Virgin Media Business, Glide, and TalkTalk Business—all offering nationwide coverage and custom enterprise packages.
4. Who needs a 100Gb leased line?
100Gbps leased lines are ideal for data centres, ISPs, financial institutions, universities, and organisations running mission-critical cloud infrastructure.
5. What’s the typical installation time for a 100Gb leased line?
Most installations take 60 to 120 days, depending on fibre availability, surveys, and civil engineering work.
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