So all done!!! But there has been a couple of odd things since:
1. When the new master cylinder was fitted and while the car was off and i depressed the breaks, there was an air leak from the gap between the break booster and the master cylinder? (yes i put a gasket in).
2. i have noticed what sounds like the break pads now rubbing on the disk. Is that normal seeing as i have replaced the master cylinder and bleed the breaks?