Being older doesn't necessarily mean being wiser.

Back for a third run, Off Their Rockers sees a bunch of eccentric senior citizens misbehaving by playing light-hearted pranks on unsuspecting members of the public.

Aged between 63 and 86, all the old cast favourites return with a few new faces thrown into the mix.

Prankster Royston Mayoh has been in the show since it started in 2013. He used to be a TV director and producer on hit shows such as This Is Your Life and Opportunity Knocks.

Now in his seventies, Royston steps in front of the camera to play tricks instead.

"I have always worked with actors and performers," he grins. "So this new career is a very welcome reversal of roles. It is rare that being an OAP is advantagous."

The stunts may seem effortless, but Royston insists a lot of work goes into making them work on screen.

"When we are 'engaging' with a member of the public, we are constantly aware of the hidden camera angles," he adds.

"We have to ensure our subject isn't facing the wrong way or speaking away from the hidden microphone.

"There's no time to relax and enjoy it fully until it's in the can. Then we can laugh - and we certainly do!"

"Huh, huh, huh, huh," is the first thing you hear, the unmistakeable laugh of Tommy Cooper, comedian, magician, a man so funny that you just had to see him to start laughing. Eric Morecambe wouldn't go on the stage after him, says Barry Cryer, one of the many stars who line up here to remember a unique giant of light entertainment. He died in 1984 but memories of him are still vivid. His humour wasn't in the joke, says producer Royston Mayoh, but the delivery of it, and it lives on today through the internet. Sean Lock, comedian, presents.