I grew up a stone's throw from Silchester, and still regularly ride around that area when I visit my folks back there.
When I started cycling and still lived in the area, I was totally unaware of the history of Calleva RC at the time. So it would be great to hear more about the club too (if anyone has any knowledge?).
It seems the local cyclists are drawn to clubs like NHRC or the Oakley Pedalers, both of which have large memberships and a wide variety of events; NHRC regularly run 10 mile TT sessions around Mortimer and the OP organise large social group rides.
It would be brilliant to have a club back around there, even if it were to be a purely social affair. I know a lot of cyclists in the area use The Plough and the Arms as stops on routes, perhaps asking some of them may give some ideas on starting something up?
Anyway, there's some great roads in that part of the country although I might be biased having grown up there... I wish I had enough disposable income to buy that trophy!
All the best with your search for information regarding the old club, I hope you get some more information. Have subbed incase anyone else shares any more info.