Excluding the King, Queen and the Wales family there are seven other working members of the Royal family with a combined average age of 76, carrying out hundreds of engagements every year - for example the Duke of Kent is 89 and still carries out regular engagements - should younger members take on more or will all these engagements become unnecessary in the future as Charles streamlines things.
They are,
Duke Of Edinburgh - 68
Duchess Of Edinburgh 59
Duke Of Gloucester 80
Duchess Of Gloucester 78
Princess Royal 74
Duke Of Kent 89
Princess Alexandra 87