Thanks Keyser,
Yeah holding it on the clutch meant hill starts etc just to pull away, as I only drive ~ 1.5 miles to work (yes I'm that lazy) I may hold off on contacting the garage and go for a long spirited drive this weekend - without breaking any speed limits - to give it a good run, then if I notice it next week I will pop back down to the garage and have them look into it.
Will have a go on the way back home to se if the clutch is slipping whilst in a high gear, haven't noticed the revs going crazy but definitely work a check.
Thanks,
Pete