Sir Elton John and David Furnish live in Windsor

David Furnish has revealed that he and Sir Elton John would love to have another baby with the help of a surrogate mother.

Elton and David's son, Zachary, was born 16 months ago and they don't want him to be an only child.

'I'd like Zachary to have a sibling,' says David, 49.

'He would be better with a sibling than on his own. We talk about it all the time.'

David and Elton, 65, are considering using the same egg donor as last time, so there is a 'biological connection' between the children.

'In terms of when, where and how, nothing's decided yet,' David tells The Evening Standard.

'I think we will wait until the summer. Our life is like a treadmill with Elton constantly working.'

SEE PICS Elton John's Grey Goose party>>

SEE PICTURE Sir Elton John with Ukrainian boy Lev here>>