Many thanks, Ken.
... make or buy a tool shaped like a wood chisel but made of wood or hard plastic. This will enable you to remove the rubbers ...
Yes and it works a treat - brilliant.
... almost entirely in one piece
... thousand pieces
. Not that it matters - I didn't expect anything else. And instead of removing the bits over the hinges, I'll leave them in and butt the new rubber up against them.
I'm not sure about the front door bit yet - at this stage I'll tackle a back door for practice.
Thanks for the tip on prepsol, Mark. I'll pick some up during the week.