| Telehouse - London (Docklands North) | Telehouse - Global Data Centers |  London | 495 | 13 | 19 | PeeringDB |
| Equinix LD8 - London, Docklands | Equinix | London | 313 | 9 | 13 | PeeringDB |
| Telehouse - London (Docklands East) | Telehouse - Global Data Centers | London | 223 | 8 | 8 | PeeringDB |
| Telehouse - London (Docklands West) | Telehouse - Global Data Centers | London | 198 | 9 | 13 | PeeringDB |
| Equinix LD5 - London, Slough | Equinix | Slough | 165 | 7 | 8 | PeeringDB |
| Digital Realty London LON1-3 | Digital Realty | London | 116 | 5 | 5 | PeeringDB |
| Telehouse - London (Docklands North Two) | Telehouse - Global Data Centers | London | 112 | 8 | 8 | PeeringDB |
| Equinix MA1 - Manchester, Williams/Kilburn | Equinix | Manchester | 109 | 2 | 4 | PeeringDB |
| Digital Realty London LHR20 | Digital Realty | London | 92 | 6 | 5 | PeeringDB |
| Equinix LD4 - London, Slough | Equinix | Slough | 79 | 5 | 4 | PeeringDB |
| Equinix LD7 - London, Slough | Equinix | Slough | 76 | 5 | 4 | PeeringDB |
| Equinix LD6 - London, Slough | Equinix | Slough | 75 | 5 | 4 | PeeringDB |
| Equinix MA3 - Manchester, Joule House | Equinix | Manchester | 52 | 2 | 2 | PeeringDB |
| Vinters Connect | Vinters IT | Maidstone | 42 | 1 | — | PeeringDB |
| Reynolds House, Manchester | Lunar Digital | Manchester | 40 | 1 | 4 | PeeringDB |
| Telehouse - London (Docklands South) | Telehouse - Global Data Centers | London | 40 | 4 | 8 | PeeringDB |
| Volta | Volta Data Centres | London | 39 | 1 | 1 | PeeringDB |
| Digital Realty London LHR19 | Digital Realty | London | 37 | 4 | 5 | PeeringDB |
| Pulsant Edinburgh SC-1 (South Gyle) | Pulsant | Edinburgh | 37 | 1 | — | PeeringDB |
| Redcentric London Data Centre | Redcentric | London | 36 | — | 2 | PeeringDB |
| Teledata Manchester - Delta House | Datum | Manchester | 34 | 1 | 2 | PeeringDB |
| Equinix LD9 - London, Powergate | Equinix | London | 33 | 4 | 1 | PeeringDB |
| Equinix MA4 - Manchester, Synergy House | Equinix | Manchester | 33 | 1 | 4 | PeeringDB |
| Global Switch London North | Global Switch | London | 32 | 1 | 2 | PeeringDB |
| Level(3) London (Goswell Road) | Lumen Technologies | London | 32 | 1 | 2 | PeeringDB |
| Global Switch London East | Global Switch | London | 31 | 1 | 1 | PeeringDB |
| London Hosting Centre | Telstra Europe | London | 30 | 1 | 1 | PeeringDB |
| UK Servers Coventry | UK Servers | Coventry | 26 | 1 | 1 | PeeringDB |
| Digital Realty London LHR21 (closed) | Digital Realty | London | 25 | 2 | 1 | PeeringDB |
| aql DC2 | (aq) networks | Leeds | 22 | 1 | 2 | PeeringDB |
| Equinix LD10 - London, Slough | Equinix | Slough | 21 | 5 | 2 | PeeringDB |
| Equinix MA5 - Manchester | Equinix | Swinton | 18 | 2 | 1 | PeeringDB |
| IP House Data Centre | IP House | London | 18 | — | 2 | PeeringDB |
| Docklands Data Centre | Docklands Data Centre Limited | London | 16 | — | — | PeeringDB |
| Equinix LD3 - London, Park Royal | Equinix | London | 16 | 1 | 1 | PeeringDB |
| Pulsant Manchester NW-1 | Pulsant | Manchester | 16 | 2 | 1 | PeeringDB |
| Digital Realty London LHR17 | Digital Realty | West Drayton | 15 | — | 1 | PeeringDB |
| LDeX1 | Iomart | London | 15 | 1 | 1 | PeeringDB |
| QiComm Tutis Point | Docklands Data Centre Limited | London | 15 | — | — | PeeringDB |
| Pulsant Reading SE-3 (South) | Pulsant | Reading | 13 | — | — | PeeringDB |
| VIRTUS LONDON1 (Enfield) | VIRTUS | London | 13 | — | 1 | PeeringDB |
| Pulsant Maidenhead SE-2 | Pulsant | Maidenhead | 12 | — | — | PeeringDB |
| Datum | Datum | Farnborough | 11 | — | — | PeeringDB |
| Digital Realty London LGW14 | Digital Realty | Woking | 11 | — | — | PeeringDB |
| Stellium 1 | Stellium | Newcastle | 11 | 1 | — | PeeringDB |
| ANS - MAN6 | ANS | Manchester | 10 | — | 1 | PeeringDB |
| Custodian CDC Maidstone 1 | Custodian Data Centres | Maidstone | 10 | 1 | — | PeeringDB |
| NGD Newport | Next Generation Data | Newport | 10 | 1 | 2 | PeeringDB |
| Reliance House | Wildcard Networks | Newcastle upon Tyne | 10 | — | — | PeeringDB |
| LDeX2 | Iomart | Manchester | 9 | 1 | — | PeeringDB |
| nLighten London STN1 | nLighten | Hoddesdon | 9 | — | 2 | PeeringDB |
| Digital Realty London LHR13 | Digital Realty | Chessington | 8 | 1 | 1 | PeeringDB |
| Digital Realty London LHR18 | Digital Realty | London | 8 | 2 | 1 | PeeringDB |
| Pulsant Milton Keynes SE-1 | Pulsant | Milton Keynes | 8 | — | — | PeeringDB |
| iomart DC1 Glasgow | Iomart | Glasgow | 8 | — | — | PeeringDB |
| Ark Data Centres - Spring Park - SQ17, P1, P2, P3, P4, P5 | Ark Data Centres | Corsham | 7 | — | — | PeeringDB |
| COLT DC London | Colt Technology Services | London | 7 | — | 2 | PeeringDB |
| DataVita DV1 Lanarkshire | DataVita | Glasgow | 7 | 1 | — | PeeringDB |
| Iron Mountain Data Center - London (LON-1) | Iron Mountain Data Centers | Slough | 7 | — | 1 | PeeringDB |
| VeloxServ DC1 - Wolverhampton | VeloxServ | Wolverhampton | 7 | — | — | PeeringDB |
| VeloxServ DC2 - Wolverhampton | VeloxServ | Wolverhampton | 7 | — | — | PeeringDB |
| aql DC5 | (aq) networks | Leeds | 7 | — | 1 | PeeringDB |
| iomart DC5 Maidenhead | Iomart | Maidenhead | 7 | — | — | PeeringDB |
| COLT DC London II | Colt Technology Services | London | 6 | 2 | 2 | PeeringDB |
| Level(3) London (Braham Street) | Lumen Technologies | London | 6 | — | — | PeeringDB |
| MyHostingSpace - Peterborough | MyHostingSpace | Peterborough | 6 | — | 1 | PeeringDB |
| Pulsant Newcastle NE-1 (Central) | Pulsant | Newcastle upon Tyne | 6 | — | — | PeeringDB |
| The Bunker (Newbury) | Cyberfort | Thatcham | 6 | — | — | PeeringDB |
| VIRTUS LONDON2 (Hayes) | VIRTUS | Hayes | 6 | 2 | 1 | PeeringDB |
| VIRTUS LONDON4 (Slough) | VIRTUS | Slough | 6 | — | 1 | PeeringDB |
| VeloxServ DC3 - Redditch | VeloxServ | Redditch | 6 | — | — | PeeringDB |
| 4D Surrey | Redcentric Data Centres | Byfleet | 5 | — | — | PeeringDB |
| ASK4 DC1 - Sheffield | ASK4 Ltd | Sheffield | 5 | — | — | PeeringDB |
| Ark Data Centres - Cody Park - A9, A101, A102, A103, A104, A105 | Ark Data Centres | Farnborough | 5 | — | — | PeeringDB |
| Bournemouth Data Centre | CLOUDCOCO | Bournemouth | 5 | — | 1 | PeeringDB |
| Brightsolid Aberdeen Data Centre | Brightsolid | Aberdeen | 5 | — | — | PeeringDB |
| Centersquare London (LHR2) | Csquare | London | 5 | — | 1 | PeeringDB |
| Centersquare London (LHR3) | Csquare | Wokingham | 5 | — | — | PeeringDB |
| Exascale - Telford (TEL0) | Exascale | Telford | 5 | 1 | 1 | PeeringDB |
| Indectron GCR1 - Gloucester, Shield House | Indectron | Gloucester | 5 | — | — | PeeringDB |
| aql DC3 | (aq) networks | Leeds | 5 | — | 1 | PeeringDB |
| iomart DC2 London | Iomart | London | 5 | — | 1 | PeeringDB |
| 4D Gatwick (Crawley) | Redcentric Data Centres | Crawley | 4 | — | — | PeeringDB |
| ANS - MAN4 | ANS | Manchester | 4 | — | — | PeeringDB |
| Arelion London HEX | Arelion | London | 4 | 1 | 1 | PeeringDB |
| Brightsolid Dundee Data Centre | Brightsolid | Dundee | 4 | — | — | PeeringDB |
| Epsilon Global Hubs London | Epsilon Telecommunications | London | 4 | 1 | 1 | PeeringDB |
| Exascale - Wolverhampton (WLV0) | Exascale | Wolverhampton | 4 | 1 | 1 | PeeringDB |
| Legend Bradford | Legend Telecom | Bradford | 4 | 2 | — | PeeringDB |
| Netwise London East (NLE) | Netwise | Canning Town | 4 | — | — | PeeringDB |
| Options IT - Park Royal Datacenter (PRDC) | Options Technology | London | 4 | — | 1 | PeeringDB |
| Pulsant Croydon LN-1 | Pulsant | Croydon | 4 | — | — | PeeringDB |
| Redhill Datacenter | Galaxy Data Centers | Redhill | 4 | — | — | PeeringDB |
| ServerChoice SC-1 | ServerChoice.com | Stevenage | 4 | — | — | PeeringDB |
| Sungard AS London Technology Centre | 11:11 Systems | Hounslow | 4 | — | 1 | PeeringDB |
| The Bunker (Ash) | Cyberfort | Sandwich | 4 | — | — | PeeringDB |
| iomart DC7 The Server Hotel Reynolds | Iomart | Manchester | 4 | — | — | PeeringDB |
| nLighten Milton Keynes LTN1 | nLighten | Milton Keynes | 4 | — | 1 | PeeringDB |
| ANS - MAN5 | ANS | Manchester | 3 | — | — | PeeringDB |
| ARO DC2 Kilby House (AIMES) | AIMES | Liverpool | 3 | 4 | — | PeeringDB |