Lou,
Welcome back to the fold.
Take it you have been in touch with the CAA to see what they formally require for you to reactivate your ticket and that you have been in touch with an examiner/school who can do the necessary.
I think the flying has not changed much over the last 100 years and certainly not the last 50, although there are some interesting changes afield of late.
One biggie is that they don't like spinning so don't go and show off.
Have fun and best of luck!
FD