George and Fiona Cottrell understood to have been interviewed under caution by Met police

Interviews of Farage aide and his mother believed to be part of investigation into donations to Reform UK before 2024 election

Nigel Farage's aide George Cottrell and his mother, Fiona Cottrell, have been interviewed under criminal caution by Scotland Yard detectives, the Guardian understands.

The interviews are understood to form part of an ongoing investigation into donations to Reform UK before the general election in July 2024.