@cstross

Going with Edinburgh to London as an example: there's plenty of capacity to run more trains between Edinburgh and Newcastle...except that Newcastle Central Station itself is pretty close to capacity

Further south the main line basically gets more and more traffic the further south you go, until it's also at full capacity south of Hitchin (where the Cambridge & King's Lynn trains join the main line)

@quixoticgeek @http @julf @marcas @tml @SteveJonesnono1