A picture made entirely of postcards of the Queen is expected to fetch £6000 when it goes under the hammer.

Girl in a Yellow Bikini by David Mach was created using many copies of the same postcard of the Queen. In it, the monarch is pictured wearing a yellow outfit and hat.

When the postcards are placed together, they make the striking image.

The artwork will go up for auction as part of the Scottish Contemporary Sale at Lyon & Turnbull in Edinburgh later this month. It is expected to fetch between £4000 and £6000.

Managing director Nick Curnow said: "The contemporary market appears to be more than weathering the economic storm. Our last post-war and modern sale had a selling rate of 84% by volume and 97% by value. Successes in the sale included sales of paintings by Bellany and Byrne.

"Mach had a hugely successful solo exhibition at the City Art Centre during last year's Edinburgh Festival and this picture is proving to be very popular with the viewing public."

Mach uses mass-produced 'found' objects to create his art, including magazines, newspapers, car tyres and match sticks.