I got them from M & P in the end, with some discounts I had saved up I got the NGK IMR9C-9H 6777 for £14 ea inc VAT. the HES I believe is different again, also the plugs differ from Carbed to Inj
Just waiting delivery
take one out is the obvious and usually done thing to do when in doubt, a couple of things that stopped me.
1. has some donut fitted wrong ones in the past which would cause more confusion, (unoffically changed as no plug change is listed in the service book)
2. its such a pig of a job (according to the write ups) to get to the plugs that once its stripped down it would have stay that way for what could be a while, which would mean missing out on the great WB rideouts