Official BBC map of Albion????
Ah unfortunately not, but there are some official maps made of Camelot they released, and they do make suggestions as to where bordering kingdoms lie. When they contradict what the show says, I am personally choosing to ignore them. Lmao. But they are handy!
And there are also interactive maps on the wiki, which speculate on the placement some places mentioned in the show, which is also fun.
On the latter map, this wonderful person here seems to have what I think is a more uncovered version of it that I dont think I have seen before, and if it is the same one it's possible they covered it up on the released promo image because they worked out it contradicted previous Official Maps they had released - one such possible contradiction being them putting a second set of mountains beyond the The White Mountains which it looks like they have labelled The Mountains of Andor alongside the Vale of Denaria which they previously put to the North East of Camelot near the border with Mercia.