I don't believe so, there were two populations of Atrebates either side of the channel prior to the Gallic Wars. Two things suggest this, firstly we are informed by the historical sources that Commois fled Gaul to Britain in order to join his own people, considering that Commios had been waging a succesful Guerilla campaign by recruiting his own people in Gaul that suggests that Atrebatic peoples were present on either side of the channel. Secondly the archaeology of southern Britain does not suggest that there was a large scale migration of new peoples in the small timescale of the Gallic wars, thus there must have either been only a few (very very influential) individuals or the Atrebates must have been arriving in Britain for a long time before the Gallic wars.
Bookmarks