The red dragon of Wales is relatively well-known, but what about the other dragon banners in Britain? According to Wikipedia (sorry!), the Anglo-Saxons were represented by a white dragon in Welsh mythology. Things are further complicated by talk of a golden dragon-banner dragon having been used by the Kingdom of Wessex at the battle of Burford in AD 752 and again seen in the Bayeux Tapestry.

Could anyone please shed some light on the matter and, if possible, direct me to sources where I can read more about it? Books are very welcome.