Cheers Chaps!
I have just spoken to an AME. He reckons that once you have had the initial class 1 then you never need it again regardless of timescales of the class 2. He suggested I go for a class 2 (£75) and then when needed get a class 1 renewal.
Does that make sense? I cannot fnd anything in LASORS or on the CAA website (maybe I am not trying hard enough!!)
MFWF