Neil and any others on the Cardiff trail

I would have thought that the records of Clubs and Societies (and similar) relating to a Synagogue were kept in the Archives.  A first source to try would be the town or County Archives.  Maybe some features might be kept at Welsh National level, which I would doubt.   If the Synagogue was in a British Isles grouping, such as United Synagogue, they might have their own archive; many organisations have their records at Southampton University in a special Library (the name escapes me).   Main items of Jewish interest would most likely be in the Hewish Chronicle.   Some bits and bobs with links may well be known to whoever looks after records for other Synagogues, any Jewish School or Cemetery, you might need to ask as far away as Hereford, Gloucester or Bath for extant still alive and working societies which certainly have groups which hold communal services (they are the South Wales Boundary of my own Birmingham congregation with (fairly active) members in Anglesey and Aberystwyth.