I think this one is going to be a money pit as after cleaning the caliper up and putting it back together I noticed that the pedal sometimes drops to the floor when braking so the system isn't holding pressure and the only thing I've touched is the caliper and pads on the OSR.
Would it be possible that I could of damaged the master cylinder as when I first started trying to free it up and wind it back in I forgot to take the lid off the master cylinder.
To be honest I should of done what junkman suggested and binned the lot I guess but at the time I thought it would be a good idea to try and save a bit so I guess it's going to have to go to the garage before I start using it.
Anyone know of a good place online for a new caliper.
Possible you may have flipped the master cyl seals. If you have one, clamp the flex to that caliper and see if you get the pedal back.