The Metropolitan Police and Counter Terrorism Policing (CTP) referred themselves to the police watchdog over the decision to close the probe into the 2025 incident.

It comes after the former Tory minister was found dead, lying face down in the kitchen of her Dartmoor home on July 9 after allegedly being hit on the head 21 times with a hammer.

The incident at an address in Greater London was reported in April 2025

A ‘firebomb’ was reported as being posted through the Reform leader’s mailbox