All sorted guys many thanks new Mot today, just a quickie to get the seal in is a fiddly job as you have to get the apron of the seal tucked into the sleeve, but once in you have to push the seal inside to locate it in place, what I did was take the old steel washer grind it down a bit on the circumference so that it now fits lose in front of the seal, then I was able to tap the whole thing in using a screwdriver and small hammer until home, washer dropped out fitted the new one and circlip in job done.