Web hosting and services provider Rackspace just completed construction on the 40,000 server facility just outside of London that we caught wind of last year.

Now they're starting to outfit the facility.

The data centre, in Slough, Berkshire, will draw power from a local combined heat and power plant that uses wood chips, waste paper and fibre fuel to generate electricity, hot water and steam.

Rackspace has converted a former warehouse on the Slough Trading Estate, to provide 55,000 square feet of net technical space. Construction has been completed and equipment is being installed in the first data hall. The first customers are scheduled to go live in June. The date centre layout has been built to Rackspace specifications, which were designed to better manage customer needs.

The datacenter gets its power from Scottish and Southern Energy, the "UK's largest dedicated bio-mass energy plant." Rackspace also informs that the they have planted over 2,500 trees as part of the company's carbon neutral hosting program. That's a lot of trees...

Thanks Alex!