London Assembly Members savaged Mayor Boris Johnson’s failed housing plans yesterday with a 15-to-nine vote of no confidence.

The Tory Mayor has pledged to tackle the lack of affordable housing in the capital by encouraging private investors to build 42,000 homes per year for 25 years.

But last year only 21,000 homes were built — most of them out of reach for people on ordinary wages.

Labour AM Tom Copley called for affordable housing to be built directly through a newly created and publicly owned London Housing Corporation.

Mr Copley said: “Since the de-facto prohibition on public-sector house-building was introduced in the 1980s, the market has never provided sufficient supply of housing to meet demand.

“With the average home in the capital soon to cost half-a-million pounds, for most Londoners property ownership is little more than a distant dream.”

The vote took place as council representatives from across London wooed developers with offers of public land.

At the iconic Shard building in central London 26 councils presented sites to developers — including land to be used for housing.

In Haringey campaigners were furious to learn that the Labour-controlled council was offering 297 council dwellings in High Road West.

They say the replacement of affordable council housing with high rent private developments will only exacerbate the crisis.

Haringey Defend Council Housing spokesman Paul Burnham said: “Previous governments demolished slums and built better housing for tenants.

“These moves will just drive people out — it’s gentrification at its worst.”

Mr Copley warned that Mr Johnson’s housing strategy suggested he was “the only person left in London who doesn’t understand the extent to which the market has failed, is failing and, without bold action, will continue to fail to adequately meet the needs of millions living in London.”

The mayor’s own research states that 62,000 homes a year need to be built to stem the capital’s housing crisis.

But Mr Copley warned: “The mayor’s draft housing strategy provides no substantive route-map to how the market will meet the mayor’s target.”