NHRC start their evening time trials next week at Ashford Hill. They have an evening club event most weeks from now through to August. Full details of all events are shown on their website http://www.nhrc.co.uk/Club_Events.html
I think that Basingstoke Tri Club affiliated to CTT this year so Tri Club members are eligible to ride any TT. If you are not a member, you will need to be a member of an affiliated club to ride. NHRC operate a “come and try it” option for up to 3 events.