An early Banksy mural hidden for years after being painted over is in the process of being revealed.

Banksy painted the mural at the Arches on Argyle Street in Glasgow in 2001 - but just six years later it was accidentally covered in grey emulsion.

It featured a full-length Mona Lisa, a gun-toting monkey in a tutu and the words "Every time I hear the word culture, I release the safety on my 9mm".

Work began on Saturday to restore the mural, which could be worth several million pounds.

Experts will carefully remove the paint in stages to reveal the artwork below.

Argyle Street Arches has appealed for donations to fund the work, which it hopes to complete by December.

Owner Scott McCormick said: "It's fantastic that the restoration can now begin, we've been planning the project for a long time.

"We're excited to now get started and display Banksy's artworks for the public to enjoy."