I was reading about Julius Caesars limited time in Britain during his conquests in Germania. I was very intrigued by the large cooperation mounted by the gallic tribes in order to resist roman occupation. Simultaneously, I noticed it's mentioned that Briton was still kind of this "mythical land" to the romans, even if they generally were well aware of Gallic Germania. So it led me to think, did mainland Gaul's know of Celtic Britons and if so to what extent?

Did they trade with each other? Did they intermingle, merry, go to war, or share tribal identification over the channel? Did they see each other as both sharing a similar identity? Did they share a common language or religion? How much did the English channel separate the two groups of people?

If there's any links on further reading regarding this I would also love to read any! Thanks for your time, I'm looking forward to the responses!