Ok success. only took a couple of hours
Hoiw I acheived this near impossible task.
Removed caliper from mounting including brake hose. Was going to split the caliper as per previous threads but was stopped in my tacks by the caliper joining bolts that were also siezed plus I don't have a new seal so that was handy.
Hacksawed a gap in pad pin so that pads would clear gap. This makes it easier to get some purchase on those peskey pins. lots of cursing and mole grip action and lots of penetrating fluid. drifted out one part from the non blind side and used the mole grips for the blind end. You have no chance if the caliper is on the bike.
Ordered stainless steel pins as per the suggestion on this thread. May well still drill a drift pin hole on the blind side as I can't go through this again.
Now were did I leave that darkened room.
Martin