Tango already mentioned it in the overview thread, but I'll say so explicitly.
Let's stick to one legal jurisdiction please. If you registered with CH for a registered office in Scotland, then the company will be operating under Scots law, which kinda make pointless our tame friendly (English) barrister knowledge (though I do know a number of trainee Scottish solicitor). Also, the future charity will be under the jurisdiction of the Office of the Scottish Charity Regulator (OSCR), and not the Charity Commission whose documents everyone been working from. The same can be said of choosing NI, which is worse as until its fully merge (soon?), registering of the company isn't even with CH.
Stick to England & Wales, it's where all of the currently elected board lives (at least currently the case for me anyway).
KTC