The Metropolitan Police has revealed that two detectives from its Counter-terrorism Command have visited Libya to discuss the ongoing investigation into the murder of WPc Yvonne Fletcher. The Detective Superintendent and Detective Inspector met Libyan officials in Tripoli.
WPc Fletcher was shot dead when policing a demonstration outside the Libyan Peoples' Bureau in St James's Square in April 1984. The bullet was fired from the building but it was never established who pulled the trigger.
More top news
The plaque at number 16 Cowley Street in Westminster marks the brown brick Georgian townhouse where Sir John lived for 31 years.
A man reportedly armed with several knives has been arrested in Whitehall on suspicion of planning a terror attack, police have said.
Metropolitan Police officer, Tom Harrison, has been crawling the course since the race began on Sunday morning.