Just to add to Matts message if anyone that is interested could reply before Monday 5PM as I would prefer to go and get them all at the same time and plan to do that Monday evening.
Ewen
As has already been said we always recommend changing the flywheel at the same time, we supply the standard dual mass item or the Competition Clutch lightweight single mass unit
Most winter tyres are designed to work below 6 degrees so that could be something to do with it. Once it gets properly cold i'm sure you'll feel the benefit