thanks lads ill try them in a few
basically what happened is when the caliper was removed to change the discs and pads on the drivers side, one of the 4 pistons got stuck, and the pad on the outside of the disc wont slot into place because of it.now my fella tried to push the piston back in with everything he could possibly use, and it still failed.
now in saying that, he blocked the top piston with he old pad, and pressed on the brake inside the car just to see if the dodgy piston moved at all, and it did!! only about a mm though but it still moved!!
so if its seized how come its moving when pressing on the brake but wont return back??