Data centers in the London market

About the London market

The directory lists 202 data centers in the London market, second among the 64 markets it covers and 54 percent of all listings in the United Kingdom. They are run by 67 operators in 33 towns and cities. London itself holds 75 of them, 37 percent of the market, followed by Slough with 38 and Northolt with 19. Bracknell and the City of London have 5 each.

STT GDC has the most listings here, 18, followed by Digital Realty with 14, Equinix with 12 and Colt DCS with 8. Colocation sites account for 118 of the records.

Capacity is published in two measures that should not be added together. Of the 16 buildings with a published IT load, the largest figure is the 108 MW listed for CyrusOne's planned LON6 in London; of the others, NTT's London 1 is the largest at 32 MW. Of the 11 with a published utility supply, the largest is Digital Realty LGW14 in Woking at 64 MW. LGW14 is also the largest listed building by floor area, at 427,000 square feet; the planned LON6 is listed at about 323,000.

Serverfarm's Edmonton site is under construction, and 4 facilities are planned, including Colt DCS London 4 and London 5 and CyrusOne LON6. 10 facilities hold an Uptime Institute certification, 1 of them, the Computacenter Data Centre, at Tier IV.