Cheers for all the replies

A few mis-conceptions I will clear up :-
I mean't remove the caliper away from the car and put it on a work-bench. I had the caliper off and tried levering pad out but ,as h21 said, was putting too much strain on brake-pipe.
Don't want to use plus-gas as I read on here that oil-based products can rot the rubber seals.
Used a chisel to try and lever out but wouldn't move - caliper piston seems ok (not seized).
Anyway my plan of action is as follows :-
Plan A
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Buy the slide hammer affair that Andy B wrote about - thanks for that

If that fails
Plan B
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Hacksaw thru the brake-pipe - get the caliper on the bench and sammy the pad out.
That leaves me with the problem of the rounded brake-pipe union nuts - hopefully a nut splitter will do the job and get them off without damaging the threads; then fit new brake-pipe.
If plan B fails :-
Plan C
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Dump it at nearest garage for them to fix

Anybody got an alternative to Plan C :question
Anyways thanks for all the suggestions - I'll let you know, in due-course, which plan was successfull
