Boris Johnson has played down the prospect of a Commons comeback at the General Election, indicating that he is committed to seeing out his full term as London Mayor.
Boris Johnson dismissed reports of a clash with George Osborne over claims that the Chancellor tried to persuade him stand again as an MP in next year's election.
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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.