I'm looking for information on the speed trials that were held in Wales between 1925-1939 (Colwyn Bay, Margam Park and probably a few others), can anybody suggest the best places to look? I've got access to the British Library so I'll be able to get hold of Motor Sport (did they cover local events pre war? or have listings of forthcoming events?), what else should I be trying to get hold of? any help appreciated.
john william davies