Asif Kapadia, the director of documentary 'Senna' about the Brazilian motor racing champion Ayrton Senna, was one of the artists that contributed to the Secret Postcard Sale.
Here the former Royal College of Art student talks to ITV London about the experience:
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The station, which saw 44m people commuters use it in 2016/2017, will be transformed into a dining room complete with Christmas decorations.
Part of the monster fatberg will go on display in the Museum of London, while the rest of it will be converted into biodiesel.
Major engineering projects at key London stations mean hundreds of trains will be cancelled or diverted.