Kemi Badenoch has offered Conservative support, in order to help the government pass its controversial welfare changes.

The Tory leader told Sky News she would be asking for three commitments from Sir Keir Starmer, if he wants to use Conservative votes to pass the reforms to disability benefits, which have triggered an unprecedented rebellion of more than 100 Labour MPs.

Ms Badenoch said: “I’m just making it very clear to Keir Starmer that if he will make commitments at the despatch box to meet our conditions which are to reduce the welfare budget, to get people into work and not to have tax rises, then we can support his bill.

“The bill is a bit of a mess. It needs some work. It looks like it’s been rushed for Rachel [Reeves] to fix other problems that they’ve got. But our welfare budget is far too high, and we really need to bring it down.”

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The prospect of the bill passing on Conservative votes would outrage Labour MPs.

An amendment they have tabled says they cannot support the bill because it would drive disabled people into poverty, and they are concerned about whether people losing benefits would find work.

Around 119 Labour MPs have now signed the amendment, while Sadiq Khan has become the most senior Labour figure to call for a “rethink”. The mayor of London has warned that the proposed cuts would “destroy [the] financial safety net” for “too many disabled Londonders”.

Welfare Secretary Liz Kendall has tried to reassure Labour MPs about the changes. But the rebels are hoping the government will water down their proposals in order to get Labour support.

The prime minister, speaking at a NATO summit in The Hague on Tuesday, insisted the government would press ahead.

Keir Starmer told Sky News: “We’ve got to get on and make that reform because the options are: leave the system as it is, trusting people and not helping them, that’s not a Labour option. The Labour option is to reform it and make it fit for the future. So we’re going to press ahead with these reforms.”

A vote is looming next Tuesday with Labour MPs deeply concerned about the changes which will see 370,000 current PIP claimants lose benefit, and affect 3 million people in total.

The rebels hope the government will climb down.

One of them, Neil Duncan-Jordan, the MP for Poole, told Sky News that relying on Conservative votes “is not a good look for any government”.

He added: “If you can’t rely on your own party, I think you’re in a serious place.”

Responding to Ms Badenoch’s offer, a Labour spokesperson said the government was “elected to deliver change” and that it’s “prepared to take on the challenges holding the UK back”.

They added: “We’re fixing the abysmal mess the Tories left behind, and MPs can either vote to keep a broken failed welfare system that writes people off, or they can vote to start fixing it.

“Next week’s bill is a test for the leader of the opposition as to whether her party has learned anything at all by being roundly rejected by Britain.”