Central London is to get a new £35 million data centre to serve businesses from early 2013.
The data centre is to make use of the old Reuters building in Great Sutton Street, and is being built by data centre provider Volta.
Once completed, said Volta, the new facility will be particularly attractive for users of latency-sensitive services in the nearby financial services industries.
The power will be supplied by two new 33kV diverse supplies, making the facility its own primary substation with two 33kV transformers to deliver resilience.
The basement and ground floor will house the electrical plant equipment, with the four floors above containing the servers in secure racks. In total the data centre will occupy 8,500 square metres of space.
The building is currently served by a number of telecoms providers, including Colt, Verizon, C&W, BT, AboveNet, EU networks and Geo Networks, allowing Volta customers immediate access to a wide range of services, said Volta.
"The project is progressing according to plan and after a long period of design we're delighted to now be at the construction stage", said Matthew Dent, chief executive of Volta.
StructureTone, a data centre specialist, has been brought in to build the facility.
In other recent data centre news, Twitter blamed a two-hour failure last week on dual data centre crashes. Two parallel servers failed at about the same time, the company said.