Boris Johnson saw his House of Commons majority cut as several Tory MPs - including one from Kent - opposed his £12 billion tax hike to pay for health and social care.

The Health and Social Care Levy Bill cleared the Commons at third reading by 307 votes to 251, majority 56.

A total of 10 Conservative MPs rebelled to oppose the legislation, including South Thanet's Craig Mackinlay and former ministers Esther McVey and Sir Christopher Chope, while many more abstained.

Canterbury and Whitstable MP Rosie Duffield was among 180 Labour members to vote against the bill.

The Prime Minister’s working majority of 83 was cut, but the unease amongst his backbenchers was nowhere near enough to derail the legislation, which will help enact his plans of a 1.25 percentage point increase in national insurance from April 2022.

The levy will also hit the earnings of working people above retirement age from April 2023 and the policy breaks Mr Johnson’s 2019 election manifesto commitment not to raise taxes.

Speaking at the third reading, treasury minister Jesse Norman welcomed the “landmark” Bill and insisted: “This levy will enable the Government to tackle the backlog in the NHS, it will provide a new permanent way to pay for the Government’s reforms to social care and it will allow the Government to fund its vision for the future of health and social care in this country over the longer term.”

However, Conservative backbencher Craig Mackinlay, said: "The government has to be applauded for finally thinking about these things, but I think haste is not due at this time. My sadness is we are just reaching for the tax lever. That’s not what Conservatives do. We are going to end up with a tax take at the highest level of GDP for 70 years."

He said “increasing a tax on jobs, something we want a lot of, seems to be rather bizarre” adding: “I’m very concerned that this is going to be wasted cash. I’m very unimpressed. And I will not be supporting the government tonight.”

Conservative MP John Baron (Basildon and Billericay), speaking earlier in the day, also expressed concerns over the “haste” at which the policy is being implemented and suggested the move risks “choking off an economic recovery”.

He said his party had previously referred to national insurance as a “tax on jobs”, adding: “The Prime Minister (Boris Johnson) in 2002, when speaking from the backbenches when opposing Labour’s increase, called it regressive.

“He was right then, I’m afraid he’s wrong now introducing this national insurance contribution tax increase.”

He went on: “This will cost jobs, it will result in lower pay and it will result in higher prices.”

Labour former minister Dame Margaret Hodge (Barking) said there were a “raft of better ways to fund health and social care”.

She added: “Put a penny on income tax and equalise rates for dividend and income tax – £13 billion. Equalise capital gains and income tax rates – £14 billion.

“Or as suggested by academics … plug the unfair gaps in the national insurance by extending it in full – not just the levy, all of it – to all investment income and working pensioners – £12 billion.”

Conservative chairman of the Health and Social Care Committee Jeremy Hunt said: “The opposition of the parties opposite to this Bill does not bear any scrutiny at all.”

Shadow Treasury minister James Murray said: “This Government is landing a tax rise which they claim will go towards social care on low-paid social care workers themselves. The truth is, this is a tax on working people and their jobs.”

SNP economy spokeswoman Alison Thewliss added: “These proposals are a tax on the poorest working people in this country. They are completely unjustifiable on that basis, it is disproportionate, it is unfair.”

The Bill will undergo further scrutiny in the Lords at a later date.

Head to our politics page for expert analysis and all the latest news from your politicians and councils.

Read more: All the latest news from Kent