Former Prime Minister Boris Johnson was speaking at the Carlton club, the Conservative party's spiritual headquarters in Mayfair, where he unveiled a portrait of himself.

The Conservatives must make the case "for a low tax global Britain" and fight the next election on a pledge to cut taxes, Mr Johnson said on Tuesday night, as he forecast a Tory recovery in the polls.

Mr Johnson also urged Prime Minister Rishi Sunak to press ahead with a new law to override the Northern Ireland Protocol and resolve the Brexit impasse in Northern Ireland.

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