Training ! Training ! Training ! .... can't emphasise this enough. Unless you're a regular Audaxer, Club rider or Mile-eater you'll need some training beforehand, especially for the 100km and 200km rides, to be able to enjoy the ride on the day. Audax UK website has some useful tips for training which can be accessed from this link.
TRAIN WITH CYCLING UK READING which runs an active program of rides every week with options of distance and speed catering for both road and off-road cyclists. Rides take in the best countryside of Berkshire, Oxfordshire, Wiltshire and Hampshire during the day on a Sunday and Wednesday (daytime and evening rides) throughout the year. A full ride list can be found here. Cycling UK Reading welcomes non-members on their rides and visitors can come along for free for a trial period. Get in touch with the club secretary for more info or to join the rides