So, thought I'd report back in case anyone else has the same symptoms.
I took the friction plates out, look what I found... two of the nine plates had fallen apart!
I am awaiting EBC friction plates and a new clutch cable (first UK ordered one!)
I ride my bike like a supermoto, it gets absolutely abused. I think I may have seriously damaged my clutch from clutch up wheelies.
Recently I've noticed When I accelerate hard from ~80mph in 4th, 5th or 6th whilst about mid rev range, my revs shoot up, along with engine noise but the power...