The UK Daily Mail:

Since his son’s birth 18 months ago, Sir Elton John has been the epitome of the proud father.

But the flamboyant star, now enjoying life as the parent of a toddler, has admitted it will be ‘heartbreaking’ for Zachary to grow up without a mother.

The singer, 65, and his civil partner David Furnish, were delighted when Zachary arrived on Christmas Day 2010.

Zachary Jackson Levon Furnish-John – to give him his full name – was born via surrogate in California and was conceived using a donor egg.

Sir Elton and Mr Furnish, 49, have made it no secret that they want to have another child, and may start trying to father a sibling for Zachary this summer.

However, in an interview, Sir Elton confessed: ‘It’s going to be heartbreaking for him to grow up and realise he hasn’t got a mummy.