The London housing association estimates £150m-£250m will be spent through the panel of firms, which will be appointed for two years, renewable for another two years.

The highest scoring bidder immediately takes the first major stage of the Aylesbury Estate redevelopment at the Elephant and Castle in South London.

This is thought to be Keltbray, although NHHT has not yet confirmed its top ranking.

Site 1 within the Aylesbury regeneration programme received planning permission last year.

The first phase bounded by Albany Road, Bradenham Close, Westmoreland Road and Portland Street consists of around 580 flats in nine buildings ranging in height from three to 15 floors.

More than 3,500 new homes will be built on the 60 acre site, half of which will be for affordable housing.

Demolition phasing plan

First Development Site
The first development site includes all the Bradenham, Arklow, Chartridge and Chiltern blocks between Bradenham Close and Portland Street. A total of 830 new homes will be built over the next six years.

Phase 2
The first stage of Phase 2 includes 300-313 Missenden, 57-76 Northchurch and the space currently occupied by the blue huts to the south of Taplow. The second stage of Phase 2 includes all the Wendover, Wolverton, Winslow, Padbury, Ravenstone and Foxcote blocks as well as Brockley House. Demolition of the existing blocks is programmed to start in 2017 and over 1,000 new homes will be built in this phase over the next seven years.

Phase 3
Phase 3 includes all Taplow and Northchurch blocks to the west of Thurlow Street as well as 184 and 218 East Street. Demolition of the existing blocks is programmed to start in 2021 and 200 new homes will be built in this phase over the next six years.

Phase 4
Phase 4 includes all the Missenden, Michael Faraday, Gayhurst, Gaitskell, Latimer, Calverton, Danesfield and Emberton blocks. It also includes Chadwell House, Lees House, Soane House, Dorwell House and 51-67 Inville Road. Demolition of the existing blocks is programmed to start in 2023 and over 1,500 new homes will be built over the next nine years.