I used to work for an archaeological consultancy firm. I remember a conversation with the archaeologists about pre-Roman Britain. I was surprised and a little confused when a few of them suggested that the various tribes living in Britain in the1st Century BC might not have seem themselves as part of a pan-British culture. For years before hand I’d carried round in my head the idea that the various tribes would be politically distinct but that they would see themselves as culturally uniform but for some small differences.