I got the discs from
www.bikedevils.co.uk who were selling them through ebay. They've been great about things and exchanged them no problem. The new ones arrived today and the difference is clear as soon as you look at them.
These are the correct offset for non ohlins models.
I hope this thread may help others who are unsure about what discs they need.
Cheers all for your help.
Chris