Shirley-Anne Somerville was commenting after the Universal Credit and Personal Independence Payment Bill passed its first legislative hurdle at Westminster.

Ahead of the crunch vote, Sir Keir Starmer ditched a mainstay of his welfare reform agenda as he battled to get the draft laws through the House of Commons.

In a major concession as MPs prepared to vote, the Prime Minister shelved plans to restrict eligibility for the personal independence payment (Pip), with any changes now only coming after a review of the benefit.

Under Scotland’s devolved social security system, Pip is currently being replaced by the Adult Disability Payment.

Reacting to events at Westminster, Ms Somerville reiterated the Scottish Government’s pledge not to cut that benefit.

“Despite the panicked, last-minute concessions they have made, if the UK Government presses ahead with cuts to disability support they will plunge more people into poverty,” said the SNP MSP.

“That is unconscionable.

“Their approach also risks creating a deeply unfair two-tier system, pushing the impact of cuts onto future applicants for disability benefits.

“The UK Government needs to stop balancing the books on the backs of some of the most vulnerable people in society.

“They need to properly listen to the overwhelming criticism their proposals have generated and do the right thing by disabled people by abandoning this bill entirely.

“I want to reassure disabled people in Scotland, that the Scottish Government will not cut Scotland’s Adult Disability Payment, we will not let disabled people down as the UK Government has done.”

The decision to remove the Pip changes from the Bill was announced just 90 minutes before MPs voted.

The legislation passed by 335 votes to 260, majority 75.

Despite the late concession, there were 49 Labour rebels, the largest revolt so far of Sir Keir’s premiership.