Philip Hoffman, who used to work for Christie's and last year founded the Fine Art Fund, says that more than 80% of its purchases are made directly from owners and attract no commission.

ECONOMIST: Buttonwood

Jean-Rene Saillard works in Geneva for the British Fine Art Fund, an investment group devoted to buying art.

BBC: Geneva's art storage boom in uncertain times

Money raised from the exhibition, which is sponsored by David Bowie's company Bowieart, goes towards the RCA Fine Art Student Award Fund, which helps support emerging student artists.

BBC: Top artists in secret postcard sale