But the official switch on is not until Sunday, when one lucky family - judged 'the most festive in the borough' - gets to throw the switch officially, along with X Factor star Marcus Collins and the mayor of Hillingdon, to start Christmas shopping season in the town.
Crowds will be large, so get down to The Chimes early - the fun starts at noon.
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(Pictured above) Shelley Peppard, The Chimes's general manager, proudly shows off the centre's new lights and Christmas decorations.