Searching for lost Muppet mural of Hertfordshire

The prank by muppeteers working at ATV Studios in Borehamwood existed for years. Now Howard Berry from The Elstree Project is appealing for photos of the mural, as he collates the history of the studios. Photo: Welsh singer Shirley Bassey with Kermit The Frog and others on the set of The Muppet Show, circa August 1981/Getty Images.