Thanks for the feedback peeps.
I've had a look at the chain and sprockets but couldnt see much wrong, but then being new to biking I'm not sure what im looking for really? Tightend the chain a bit as it was quite slack, took it for a ride and it was still there.
Also noticed a flat spot on the rear rim looks like it was done by a tire fitter
but sure thats not causing the issue as it stops when the clutch is in or the power is off.
What i did notice is the bearingy looking thing the clutch cable attaches to has a bit of play in it, not sure if thats normal.
Guessing its chain and sprocket change then.