New Baby Brother or Sister on The Way For Prince George!

Less than the significant twelve week milestone, royal officials confirmed that the Duke and Duchess of Cambridge, are expecting their second child, the Palace said the Queen and members of both families were delighted.

Prince William and Catherine's second baby will become fourth in line to the throne, moving Prince Harry further down the line of succession.

Prime Minister David Cameron, Labour leader Ed Miliband and the Archbishop of Canterbury were among those to offer their congratulations to the couple.

For a second time, Kate is suffering from an acute form of morning sickness - though this time she's being treated behind palace walls and not at a private hospital with representatives of the world's media gathered outside.

The pregnancy has generated international excitement and will continue to do so but this impending birth will lack the constitutional significance of Prince George's arrival.

Monday's announcement has performed one unintended but useful role for the Windsors. Headlines about the Queen's view of Scottish independence will be replaced by extensive coverage of a royal birth next year.