Scotland Yard is investigating £500,000 of donations to Reform UK by Fiona Cottrell, the mother of 'Posh George', a convicted criminal who is close to Nigel Farage, it emerged last night.

Exclusive: Latest Guardian revelation about gift from cryptocurrency tycoon comes as Reform UK leader forces byelection

George Cottrell’s mother, Fiona, at centre of criminal inquiry over potential evasion of restrictions on donations