Does anyone have any suggestions (helpful ones anyway :-) ) for removing the clutch cover.

I've removed the bolts and it's still stuck fast, there doesn't seem to be anywhere to supply an leverage and I don't really want to try just jamming a screwdriver in the joint as I would like to save the gasket, although if that is my only option I'll have to do it.

The service manual doesn't supply much assistance for this task either.