Well I'm still baffled by the symptoms I had and how I came to get them but all is sorted now.
Got up early this morning, fitted a new set of front pads, and found that one of the pins on the passenger side was also siezed. The new pins haven't arrived yet so cleaned up all the old ones again an refitted everything. Went to the rear and removed, then refitted the new shoes I had fitted last week. Even though everything is free, I wasn't convinced that the self adjusters were adjusting so set them up by hand. Then set up handbrake again. Then I set about bleeding.. Couldn't do the rears as the nipples were already rounded off .
Pedal now feels better than it has ever done and even though the pads and shoes are not bedded in yet the brakes also feel better than they ever have before.
Will fit the new guide pins when they arrive and order 2 new rear cylinders, bur for now I'm a happy bunny !!!
Thanks for all the replies....... As ever much appreciated
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Chris