RCA Secret Exhibition
If you click on postcards you can browse them - there are 2700 though. I've just gone cross eyed trying and definitely spotted a Quentin Blake and a Paula Rego.
There are cards by Quentin Blake, Nick Park and Sara Fanelli
John Squire (Stone Roses), Jimi Tenor (Jimi Tenor & His Shamans), Holly Johnson (Frankie Goes to Hollywood), and Paul Simonon (the Clash)
fashion designers Paul Smith, Manolo Blahnik, Sophia Malig, Johnny Moke and Sonia Rykiel
- Tracey Emin, Paula Rego, Philip Akkerman, Derek Boshier, Maggi Hambling, Allen Jones, Mimmo Paladino, Alex Katz, Yoko Ono, Olafur Eliasson, David Nash, Richard Wilson, Nicola Hicks, Magdalena Abakanowicz and Guillermo Kuitca.
People queue up all night to buy one and they all sell for £40 each, so you could get a Damien worth thousands.