From midnight tonight same sex couple across England and Wales can enjoy full marriage ceremonies and the same rights as heterosexual couples.
The govenment's legislation came into force last July and couple's were able to register their intention to marry under the act on March 13.
A number of couple's are bidding to become the first ever to be married in Britain by trying to time it so their vows are said just seconds after midnight.
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Detectives in Westminster are investigating after the man was discovered on the Route 189 bus in Marylebone shortly after midnight.
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.