Nathan Wellard and Maeve Neal (Pictured), based in King's Lynn, let the graffiti artist Banksy use their white trailer as a blank canvas when he was little-known.

Banksy spray-painted a piece on it called Fragile Silence, depicting commandos landing stereo equipment on a beach.

Now the couple, who make their living supplying circus tents, hope selling the trailer will allow them to buy a more conventional home.

They bought the two-bedroom, refrigerated trailer, 11 years ago for £1,000, but a growing family and recent big-money Banksy auctions have meant it is the perfect time to sell.