Traced the entirety of the England/Scotland border from NPE this evening (and uploaded it). This hasn't changed one bit, as far as I know, since the 1950s - and indeed much later than that - and the path rarely intersects with already-existing stuff, so the traced accuracy should be reasonably good.

Branching off it, I have a bit of the Cumbria/Northumberland border, but couldn't find the Scottish Borders/Dumfries and Galloway border (well, on NPE it would be the Roxburghshire/Dumfriesshire border).

We were discussing on IRC earlier about how, now that we have borders coming into the database, to render different types of borders at different lowzooms and different weights. If we do this by keyword, (parishnumber defined by Map_features, so my England/Scotland border would have border_weight=1, whilst border_weight would also be used for the borders between US states and German Länder; border_weight=10 would be used for English parishes and French communes? Perhaps there is a more elegant solution, but if so I'm not seeing it. (could relations help?)