Receiving an Oscar nomination for documentary feature The Square is "double cause for pride", said British-born actor Khalid Abdalla, who stars as one of the main protagonists in the film.
Jehane Noujaim's documentary is based in Tahrir Square, in Cairo and follows the journey of three protesters, each from a different background.
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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.
Premier League clubs have agreed to pay all full-time staff the living wageof £9.15 an hour in London or £7.85 an hour outside the capital.