I will say, the graphics look GORGEOUS. Surprisingly, I actually am disappointed they didn't retain the Pokemon in the overworld instead of random encounters from Let's Go, something I noticed immediately.
I concur that the region would appear to be Great Britain (not the UK; Northern Ireland is definitely missing if that is what it is). Was hoping for Scandanavia, but still a good choice. But...it looks like it might be very linear geographically, south to north, which would be bad. I prefer the loopy ones like Hoenn and Sinnoh.
Mostly looks great, but I'm disappointed by the starters. They don't look very distinctive, they remind me of the dreaded Gen V monkeys. Especially after the adorable Gen VII starters.
It seems to me like we've seen very little of the Gen VI Pokemon since X&Y, the only two Kalos games (the least for any region), so they haven't stuck well in my memory sadly, and this doesn't seem to be helping, with Meowstic being the only Gen VI Pokemon I could spot. At least Gen V and VII seem to be having better luck.
So far, definitely hyped. Especially since I fall in the 'Gen VII was good' camp, so I don't have the same reservations as people who didn't like it.