Three years ago Mark Cahill who lives near Halifax became the first person in the UK to undergo a hand transplant.

The operation was a success - so much so that when Mark's wife suffered a heart attack a few weeks ago, he used that new hand to perform chest compressions on her until an ambulance arrived.

Mark says he knew his new limb would be life changing - but now it's proved to be life saving as well.

Chris Kiddey reports: