'The Chokeables': Star-studded St John Ambulance video offers tips on treating choking babies

British actors David Walliams, David Mitchell, Johnny Vegas and Sir John Hurt have lent their voices to a new video campaign offering tips on how to save a choking baby.

The light-hearted clip, named The Chokeables, has Peep Show's Mitchell playing a chewed-up pen lid, while Britain's Got Talent judge Walliams voices a princess doll.

Comic Johnny Vegas portrays a jelly baby who exclaims: "I'm a baby that chokes babies - such a tragic irony."

And Oscar-nominated Hurt - who has starred in the likes of Alien and the Harry Potter series - offers a cameo as a coughed-up peanut.

Watch ITV News reporter Sally Bidulph's report on the new campaign:

The advert comes from St John Ambulance, which said four-fifths of people would not know what to do if they witnessed a baby choking.

In the video, parents are told some simple tips for how to act if their child is choking:

• Lay the baby face down on your thigh and support their head, before placing up to five blows between their shoulder blades

• If that doesn't work, turn the baby over and give up to five five thrusts in the chest, using two fingers

• Check the mouth - if the obstruction still hasn't cleared, call for an ambulance

Watch the St John Ambulance guide to saving a choking baby:

Find more information on first aid for young children on the St John Ambulance website