A signalling problem at Clapham Junction is the cause of the delays for commuters this morning. Travellers should expect delays of up to 30 minutes to and from London Waterloo. Delays expected until around midday. Visit National Rail for more info on how services are running.
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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.