London mayor Boris Johnson has welcomed plans for £5.5bn redevelopment of Battersea Power Station but called for more work to be done on the scheme to ensure it meets the city's planning strategy.

In his report to Wandsworth Council, the mayor advised that parts of the Rafael Viñoly-designed development fail to comply with policies set out in the London Plan, with concerns over a lack of affordable housing and children's play space. Treasury Holding UK's masterplan for the 40-acre (16.2-hectare) site, which has remained derelict since the 1980s, includes 700,000sq ft (65,032sq m) of restaurant and retail space, a hotel, community facilities and a conference centre.

A riverside park, an extension to the Riverside Walk through to Battersea Park and public access to restored historic areas of the Grade II*-listed power station are also proposed, as well as office space and more than 3,700 residential units. According to the Independent, Johnson said: "This key part of the capital is the biggest development opportunity remaining in London and the power station is one of London's much-loved historic landmarks. It is vital that we get the redevelopment of this site right.

"I am encouraged by what I have seen so far and confident that the developer, in partnership with Wandsworth Council, can work up these proposals into a high quality masterplan."