In reply to Removed User:
So you're riding in a group and do something stupid, as a result of which someone's £5k new bike gets written off or, worse, they end up in hospital with severe injuries. Or you ride into a pot hole and bring down the people behind you.
Or you manage to knock someone over, say a small child, who steps out smartly onto a zebra crossing when it's raining.
All will lead to difficult times, made easier if you have third party insurance.
I pay not a lot to British Cycling for my third party insurance and my race licence, in that order.