0. cluster population centers into commonly known cities (i.e. show London instead of Islington or Walhamstrow)
1. display names of the top 10 population centers in the UK
2. display towns with stations (if crowded prioritize termination points and junctions, and prioritize larger places over smaller places)
Having said that, its pretty cool to see the new and old network when zoomed in (assuming that it is half-way correct)
There is a very narrow window in spring during which the ascent is possible, due to weather (enough ice to get over some sections, but weather not leathal). If you go too early you freeze or get blown off in 0 visibility, if you go too late, the ice has thawed too much and you get washed off in the rapids.
Sometimes the window is only something like 10 days during which you (and everyone else) have to ascent and descent from basecamp.