Sunak has spent £35bn more than I would have, claims Truss

Former PM says spending would have been 35.5 billion lower over two years if her plans had been carried through.

She will suggest Mr Sunak was wrong to grant extra money to public services.

Comments are likely to reopen wounds within the Conservative Party and reignite debate about cuts.

Cabinet sources say Sunak would have to find savings to deliver pre-election tax cuts.

David Davis , the former Cabinet minister, claimed Ms Truss had discredited her own arguments.

David Davis said Truss was going to give low taxes a bad name and that's what she’s done, he said.

The Telegraph can also reveal that Truss considered including a “flat tax” in her mini-budget that would have meant all workers paid just 20 per cent of their incomes to Treasury .