An investigation is under way after a man convicted of possessing cannabis was fitted with a tracking device attached to his false leg.

Bret Ravenhill, 29, who lost his limb in a motorbike crash six years ago, said a security worker failed to spot his left leg was made of metal and detachable.

The forklift driver, from Barnsley, South Yorkshire, said the woman who came to fit the tag on his leg failed to notice his disability.

He told The Sun: "I thought she would realise straight away - but she never bothered to turn up my trouser leg or look underneath my sock. I just left things as they were for a joke.

"I didnt break my curfew once - but I could have been out living it up every night. Im no danger to the public - but what if theyd done the same thing to an armed robber?" he told the paper.

A spokeswoman for G4S said: "We conduct our monitoring operation under rigorous procedures which include carrying out an assessment of the leg that is being tagged.

"It would appear that in this instance the procedure has not been followed and we are conducting a thorough investigation into the matter now that it has been brought to our attention."