A decent bike does make a massive difference. Reckon I can go about 10% quicker on my systemsix (hi mod carbon, proper aero) vs my much older scott addict, even on semi decent wheels on the scott. And groups make a massive difference.
Box hill is lovely. Just a nice easy 5% incline. Gonna do Alpe D’Huez tonight on Rouvy. Absolkutely loving Rouvy.