How was the government system in Gaul?

[Arturus Uriconium]

Excellent point Andy. It does seem, and Caesar alludes to it, that the druids had the ultimate say, or, that nothing was done without consulting them. The Romans realised the power they had and, in Britannia, knew destroying their power base at Anglesey would weaken the kings. It has been argued that Boudica's revolt was as much to do with what happened to the Druids as what happened to her daughters and her inheritance. It would certainly explain how she could gather such support.