How many executors can you have in a will ?

I have been asked this question yet again by another one of my elderly neighbours so looks like the answer to my original question is that you can have up to four executors . Is this correct ? Also they wouldn’t have to be too old would they ?

As post #6: the testator can nominate any quantity. That makes it possible for one or more to 'reserve power' (i.e. to let other/others deal with it). Example: nominating all the partners in a large firm of solicitors.

There is a limit of four re who can actually take the Grant of Probate UNLESS it's a charitable trust [no limit]

On age: there's no upper limit.