The Queen is currently riding a wave of popularity, but even she has seen her ratings slump now and again.

How will Prince Charles fare when he takes over a role that requires the utmost diplomacy and tact?

A bag of contradictory tendencies, he’s a far more volatile prospect than his mother.

There are indisputably praiseworthy achievements – the setting up of the Prince’s Trust, for instance.

But as this survey of our royal family exits (backwards and bent at the waist) from our screens, there are also the more controversial aspects of Charles’s character to be explored.

Those ‘black spider’ memos, for example, when he lobbied ministers on matters close to his heart.