In reply to GrahamD:
I have a Eurosport subscription and as far as I know in terms of cycling you get all the big races that are on GCN (both channels are from same stable), think its about £50 per year. For me it means live Giro stages, all the spring classics, more flexibility over watching Tour/Vuelta (although they are covered on ITV4 as well), cyclocross etc. Aside cycling you can binge away on other sport - you get all the climbing world cup! Also Le Mans 24hrs etc
On the negative side, a while back Eurosport updated their TV app without warning which obsoleted my TV (so had to switch to running it from laptop / HDMI onto telly etc), although we recently bought a new TV so can watch direct from the TV app again, but it was pretty annoying.