The Metropolitan Police are investigating Nigel Farage’s right-wing populist party after footage appeared to show party officials arranging secret contributions from a foreign donor.

Scrutiny over the gifts and support provided by George Cottrell to Mr. Farage, the Reform U.K. leader, will continue even after he won last week’s special election in Clacton.

Emergency services said they were working at the scene of a derailment near Lewes, in East Sussex, on Thursday. Eighteen other people were less badly hurt.

With forecasters issuing a warning for very high temperatures, this summer is on track to be one of the hottest yet.

Nigel Farage, the right-wing populist leader, forced a by-election in his parliamentary seat of Clacton after he came under pressure over his financial declarations.