A number of well-known artists is promising artwork to the Tate to help fill in the museum’s gaps in contemporary work. “In all, 23 artists are committed to giving – and the gallery naturally hopes this will become a fashionable bandwagon which others will wish to scramble aboard. At the most conservative estimate the promised gifts are worth £2.5m. But if an auction house could assemble such a collection, it would certainly go for many times more.”