Hi thanks for all the responses, the garage removed the casing over the front sprocker and there was a big build up gunge below the sprocket the garage cleaned this up with break cleaner for me and cleaned the cover. The oil filter was given another quarter turn. They were not sure where the leak was coming so asked me to drive for 15 miles or so and then come back which I did and they could see no oil leak. I checked the bike last night and there was no sign of a leak so fingers crossed its been sorted but still no 100% sure where it was coming from my guess would be the oil filter even though there appeared to be no traces of oil coming from it. The garage spent about half an hour on this and they didnt charge me. I would love to be confident to do my own servicing but im just not cut out for it i prefer to pay someone who hopefully knows what they are doing, thanks again for the amusing replies.