Here’s how the royal birth is unfolding at the private wing of St Mary’s Hospital as we await Cambridge baby number three.

Security is tight outside the hospital.

(Dominic Lipinski/PA)(Dominic Lipinski/PA)

The world’s media is watching.

(Kirsty O'Connor/PA)(Kirsty O’Connor/PA)

Police officers are stationed outside the Lindo Wing.

(Kirsty O'Connor/PA)(Kirsty O’Connor/PA)

Here’s where William and Kate’s new arrival will fit into the Royal Family’s family tree.

And this is where the baby will feature in the line of succession to the throne.

Commentators speculate on the baby arriving on St George’s Day.

The world’s press is set up outside the hospital – hoping to be the first to catch a glimpse of the newest addition to the Royal Family.

Early on Monday morning, Kensington Palace announces Kate has gone into labour.