There is a good service running on the Northern line this afternoon as well as the DLR and the Overground.
The Circle and Waterloo & City lines are closed.
All other lines are running a special service.
Check the TfL website before you travel.
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.