Sorry didn't explain that well at all.
Taken me and the neighbour (retired mechanic of 20 years) almost 2 hours to get the driver side done.
1st) Top pin was flattened on the end you have to hit which meant it was a bit wider than the whole, took a hell of a lot of hammering to get it to come out.
2nd) pad on inside was stuck, at first he thought it was rusted but that wasn't it, the caliper had like a raised bit which meant the pad was really stuck in hard so had to use a combination of wiggling, hammering and generally lots of force that shouldn't have been needed)
3rd) getting a pad back into that part of caliper due to the raised bit of caliper was a very tight fit.
4th) had to file down the flattened pin to get it back in.
I think I'll be replacing the pins next time, though I'm tempted to take it to a garage next time so they can have the joy of fixing it. If I hadn't needed the car tomorrow for work I'd have given up ages ago.
Anyway, it's done now. I can see how it should be a really simple process, just a few factors added up to make it take 4 hours. Though I did eat tea in that time too.
Beer now, knackered!