Dr Hilary Jones explained on Daybreak how Mark Cahill's hand transplant was a world first.
He said hand transplants have been done since the 1960s, however this is the first time that the hand has been removed and the donor organ has been transplanted on at the same time.
More top news
Local councils are to get an almost £6 billion fund to fight potholes over the next six years.
The Prime Minister and the Leader of the Opposition praised the courage of Britain's armed forces in a Christmas message to troops.
Nick Clegg has vowed to avoid appearances on reality shows like I'm a Celebrity Get Me Out of Here! when he stands down as an MP.