That Queen: what a cut up!

If it will fit in my mouth, I'm not biting

The photograph above, to be used as the official royal Christmas card, is described by the palace as "a touching moment between mother and son" as Queen Elizabeth "struggles to hold back a laugh" upon being told a funny joke by Prince Charles.

It doesn't look like much of a battle:  "We are not amused" seems more like it, but Royal wit has always been elusive. Har har har.