“Founders need to see a stable environment to build a business in the UK”

Time is running out for Rachel Reeves to reassure the sector she has spent months courting.

With tax rises looking increasingly likely in Wednesday’s Autumn Budget, the mood across UK tech has shifted to concern, reviving the warning issued earlier this month by some of Britain’s most valuable founders: change course, or risk watching high-growth firms leave home soil.

That warning came in the form of a letter to the Treasury , signed by firms including Revolut, ClearScore, OakNorth and Quantexa, companies collectively worth more than $100bn.

Together, they warned that any move on capital gains tax, inheritance tax or a form of exit levy risks undermining confidence, risks delaying London listings and pushing f

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