Congratulations to Mrs Cameron

On the good news side of politics comes the news that Samantha Cameron is expecting their fourth child. There are bound to be those cynical souls who think it is a bit of good timing for the Conservative leader, but even I would question that attitude!

Samantha, who is 38, is due in September, raising the possibility of another child being born to a sitting PM, should the Conservatives win the general election. It would be only the second in 150 years. Tony and Cherie Blair had their fourth child, Leo, while residing at Number 10.

In good political style, the pregnancy was heralded by a manifesto. Last September, David Cameron said: "I don't believe Britain is over-populated. I don't have any plans to reduce it. I would quite like to add to it, personally, by quite possibly one, at some stage in the future."

Earlier this year, David Cameron revealed his wife would take a more active role in the election campaign than previous political spouses have, calling her his "secret weapon". Some might say she has deployed her trump card!