Mr Postman delivered my rebuild kit for my calipers. So got the rear calipers fully stripped down this evening.
One was in good nick and could get away with a good clean. The other hand brake mechanism was bunged up with rusty hardened grease.
The circlips where a little bit of a t**t but got there in the end after they brokeb the circlip plyers

The better of the two.
This ones seal crumbled apart.