Lindo Wing confirmed for royal birth

Prince George's sibling will be born in the Lindo Wing of St Mary's Hospital

In the coming weeks the brown door of a private maternity wing will once again become the focus of considerable global attention.

The American networks aren't distracted by a domestic election.

Facts, once again, will be in short supply but that won't deter the broadcasters (including the BBC).

A royal birth, for the monarchy's supporters, is a moment to celebrate.

Its critics view it as a moment to consider whether what they call "this circus" of a hereditary institution is the best way to run things.

For William and Kate a very private moment will, eventually, be shared very publicly.

Their second child will be a prince or a princess. But not, as things stand, a future king or queen.

Prince George will have a new playmate; the Cambridge family will be expanded; and the monarchy's future will be further strengthened.