Sir Keir Starmer has said next week’s Budget will be “based on fairness” and will spend cash on tackling illegal working as well as reducing “the pull factor” for migrants coming to the UK.

Chancellor Rachel Reeves is widely expected to raise taxes on November 26 in order to fill a multi-billion pound gap in her spending plans.

She will hand £1 million to a new team of investigators to root out rule-breaking businesses, No 10 announced on Thursday.

The Prime Minister said it will be “a Labour Budget with Labour values” as he expressed optimism for the future despite widespread gloom about the UK’s economic prospects among the public.

Asked whether the wealthiest will bear the burden, Sir Keir told reporters on his way to the G20 summit in South Africa: “Obviously the details of

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