British artist Andy Holden is to reveal how he stole a piece of the Egypt pyramids in a new exhibition at the Tate Britain in London.

Under Egyptian law, it is illegal to remove any item from a cultural heritage site without the Egyptian government's permission. An international Unesco convention also prohibits the removal of cultural artefacts without the country of origin's knowledge and permission.

In 2008, Mr Holden returned to Egypt and attempted to replace the rock in the exact spot from where it was taken, enlisting the help of a tourist to film his efforts.