The UK PPL licences one to fly any single engined aircraft below a certain
weight. However, you need a checkflight with an instructor on a new aircraft
and to have that written into your logbook. I was able to be checked out on
four different types during my training which I found very helpful.
It doesn't help your skills to be stuck with one type in my opinion. Since
then I have been checked in another five or six GA types. It usually means
an hour's flight and a couple of landings with an instructor.
I am 71 years old, and did not start flying until I was 64, so there is
plenty of time for you yet!

--
Cheers Quilly

For four good books to read look at...
http://www.quilljar.btinternet.co.uk/covers.htm
Buy three or four altogether and get economy postage.