Art fans have been queueing in Battersea overnight - despite the freezing conditions - in the hope of picking up artwork by a famous artist.
The Royal College of Art's Secret Postcard Sale gives you the chance to buy a postcard-sized piece for just £45.
Toby Sadler explains:
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:
1,954 postcards had been sold as of 1pm, leaving around 750 still on sale.
Hundreds of art lovers braved snow and freezing temperatures this morning for the chance to buy artworks by some of the country's top creative names for just £45.
Some had been camping outside the Royal College of Art (RCA) since Tuesday for the Secret Postcard Sale, which features miniature works by designer Sir Paul Smith, Wallace and Gromit creator Nick Park and artist Julian Opie.
An RCA spokeswoman counted 50 tents outside the site at Battersea, south-west London, as of last night, and said there were at least 300 people queueing when the doors opened at 7am today.
But even those at the front were taking something of a gamble on getting their hands on a famous artist's work as the designs are all anonymous, with signatures on the back only being revealed after purchase.
This is the 20th year of the RCA sale, and organisers hope it will raise more than £120,000 for a fund to support emerging artists.
The event has already made more than £1 million for artists' grants and bursaries since it was established.
Artists who have previously given works to the sale include Yoko Ono, Anish Kapoor and Tracey Emin.
The exhibition was the brainchild of a student at the art college in 1994.
Art lovers are expected to be queuing round the block today for a chance to buy an original work by a famous artist- albeit a rather small one.
The Royal College of Art's sale of postcards is an annual fundraising event now in its 20th year.
The secret part of the sale is that the creators' of the postcards remain anonymous until they are bought and the signature is revealed on the back.
This year's sale includes pieces by Julian Opie, Paula Rego, David Bailey, Sir Paul Smith and Nick Park.
The Royal College of Art in Battersea has unveiled its latest 'secret' art sale.
Watch the video to find out what the secret is, and how you can get your hands on some postcard-sized original artworks.
Find out more about RCA Secret here
The Royal College of Art is holding its annual secret postcard sale in ten days time at its centre in Battersea. Hundreds of postcard-sized artworks are up for sale but buyers won't know who the artist is until they buy one and then check the signature on the back.