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

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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.

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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.

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Fine-art insurers such as AIG, Chubb and Fireman's Fund keep a list of appraisers they have vetted.

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