If you are interested in fast road riding and/or racing then you should contact:
British Cycling
The Gregarios Superclub Ciclista ~
Fast Sunday club rides (start from Bushey), cyclo-sportives, racing, training, touring
Herne Hill Velodrome
Hillingdon Circuit ~
Children and younger riders welcome and catered for
Kenton Road Club
Westerley Cycling Club
Willesden Cycling Club