Spending commitments outlined in the Autumn Budget will be delivered whether a Brexit deal is struck or not.

Downing Street moved quickly to confirm pledges would be delivered after chancellor Philip Hammond told the media at the weekend that a no-deal scenario would require a "a new Budget that set out a different strategy for the future".

Speculation had been growing that the chancellor could back-track after revealing that the forecasts used in the budget were based on an "average-type free trade deal" being agreed between the UK Government and the European Union.

In interviews with Sky News and the BBC, he said a no-deal Brexit would require a "different response", with "fiscal buffers" remaining in place to provide support for the economy.

While Downing Street moved quickly to quash suggestions that pledges could be reversed, Mr Hammond did not address the issue when he unveiled the budget to MPs.

But he did stress the huge importance of getting the “right” deal in shaping the country’s economic future.

“We are at a pivotal moment in our EU negotiations and the stakes could not be higher,” he said.

“Get it right and we will not only protect Britain’s jobs, businesses and prosperity but we will also harvest a double deal dividend.

“A boost from the end of uncertainty and a boost from releasing some of the fiscal headroom that I am holding in reserve at the moment.

“We are confident we will secure a deal which delivers that dividend. Confident, but not complacent. We will continue to plan for all eventualities.”

Mr Hammond said he would be increasing the budget for Brexit preparations from £1.5bn to £2bn in 2019-20 – just shy of the £2.2bn already given to Government departments in 2018-19.

He also said that he may upgrade the Spring Statement a “full fiscal event” – or a full budget – should the economic outlook change and that he would retain some “fiscal headroom”.

Mr Hammond fired several shots at the opposition Labour Party, saying “we did what needed to be done” to get the country’s economy “back on track”.

“We have reached a defining moment on this long hard journey, opening a new chapter in our country’s economic history where we can look confidently to the future and set our course for where this remarkable country will go next,” he said.

“Today, I can report to the British people that their hard work is paying off and the era of austerity is coming to an end.”

Labour leader Jeremy Corbyn dismissed the claim that austerity was coming to an end, describing the Autumn Budget as a "broken promises budget".

"What we heard today were half measures and quick fixes while austerity grinds on," he said.

Calling for a pay rise for public sector workers and further funding for the NHS, he said the Government was focusing on "ideological tax cuts".

Mr Corbyn also said that Brexit uncertainty was "making things even worse", and raised concerns that some Conservatives are pushing for a "race to the bottom" on worker’s rights and regulations once the UK leaves the EU in March next year.