The odds for a white Christmas in London have dramatically increased thanks to Pop Up Screens. Head to Notting Hill's 20th Century Theatre and step through their magic wardrobe to discover a secret cinema surrounded by snow. Rumour has it that a bar filled with an abundance of mulled wine, hot chic, brownies and popcorn also lies within. Only one way to find out right? A lawyer and a little girl must prove that a man claiming to be Santa Claus is the real thing. With Academy Award Winner Richard Attenborough leading the cast this is nothing less of an absolute classic. Certificate U. Runtime: 1 hour 54 minutes. Seating is unallocated, but the screen is on a stage so it's hard to get a bad view. Doors open at 12:00pm, film starts at 1:00pm.