X-Men star James McAvoy, who has earned rave reviews for his role in Macbeth, will go up against Rafe Spall for Constellations and Rupert Everett for The Judas Kiss for the Best Actor award at the Olivier Awards tonight.
Twelfth Night's Mark Rylance and The Curious Incident Of The Dog In The Night-Time's Luke Treadaway are also nominated.
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The Royal Fleet Auxiliary ship RFA Argus has been recognised for providing aviation and medical support over 33 years of service.
Buckingham Palace, London's Tower Bridge, Old Trafford and Big Ben are taking part in the event to raise awareness about climate change.
Widespread frost for most areas as temperatures dip below freezing.