Politicians in London remain committed to overturning the “calamitous decision” to go ahead with plans for a third runway at Heathrow airport.

Last night Member of Parliament (MPs) voted overwhelmingly in favour of expanding Heathrow airport to include a third runway.

A total of 415 MPs voted in favour of the runway and 119 voted against – a majority of 296.

Speaking on behalf of the London Assembly the chairman Tony Arbour said: “The London Assembly unanimously opposes the expansion of Heathrow airport on the grounds of air pollution, noise and the health impact it will have on Londoners.

“Together with the Mayor we shall seek to overturn this calamitous decision, which can only increase the environmental harm that the airport already creates.”

Earlier this month, the assembly announced it was officially opposing the £14 billion airport expansion.

It said that fundamental issues like noise pollution and the cost of expansion remained unresolved.

A motion proposed by the assembly said it would “reiterate its long-standing opposition to a third runway” and will “campaign to prevent its implementation”.

At Mayor’s Question Time last week, the Mayor of London, Sadiq Khan also said he would continue to fight the plans if parliament were to vote in favour of the expansion.

Mr Khan called last night’s vote the “wrong decision” for Londoners but affirmed his commitment to fighting the plans.

He said: “It’s the not the end – as Mayor, I’m joining the legal action brought by local authorities in opposition to Heathrow expansion.”

The No 3rd Runway Coalition – a group of MPs, campaigners and residents against the expansion – believe that given the size of the project, there needs to be stronger cross-party unity in order for the expansion to actually be delivered.

Last night’s vote saw parties torn between which way to vote with members of each major political voting both for and against the expansion.

Conservative politician Greg Hands resigned just last week as MP for Chelsea and Fulham in order to oppose the expansion despite pressure from his party to vote in favour.

Paul McGuinness, Chair of the No 3rd Runway Coalition, said: “There’s a long way to go before Heathrow can start knocking down villages or putting spades in the ground.

“And even though one shouldn’t underestimate the political risk that will continue to dog this project, we shall be supporting the legal action of our member councils and City Hall, in which they are utterly confident of victory.”