Thanks for the info. Ended up cutting away the shield as per some previous advice on the forum. For anyone else trying this themselves the hardest part was getting the hub out of the back plate. Tried hammering then soaking overnight. Next day still no joy. Tried a hydrolic pulley stilll no luck. Ended up heating with a blow torch putting on a bench and using a drift and a sledge hammer. Finally went on third heating drifting and considerable swearing and cursing. At least I will be prepared when the other side inevitably goes. All quiet for now though.
Thanks for help and advise.