Best bet would be to have them removed with some special kit and fitting new ones.
Most garages these days have the kit to do them now.
Lots of removal tools on the market if you wanted to buy something to get them off
Thanks for your help, thought this might be the case. Its difficult to find the right shape so I think I will find away to get them off. The brakes are seized so can't get to a garage, anyone have any tips or will I have to buy something?