In pictures: David Mach’s bikini collage made of images of the Queen

Charlotte Riordan from auctioneers Lyon & Turnbull poses next to Girl in a Yellow Bikini by Turner Prize-winning artist David Mach.

The collage is made up of thousands of postcards of the Queen wearing a yellow hat. The portrait, which is expected to fetch up to £6,000, is one lot from the auctioneer’s Scottish contemporary sale on Wednesday. Mach often takes objects such as magazines and teddy bears and transforms them into temporary public installations.