Absolutely no third rail between birmingham and cardiff and only a few over head catenary wires round birmingham, train companies also have a duty to get you to your destination,
I know. Hence I recommended the train. Virtually no third rail north of London except some of the Merseyrail stuff. Most of the routes around Birmingham are OHLE electrified, but I presume Molly would go on Cross Country, and thus it’ll be a diesel, and not really an issue. Even if he went into London and up the WCML they’re not exactly forecasting snowmageddon. Plus the WCML is marginally less susceptible than say the ECML because of the propensity to use gantries, not headspans, which are less affected by the weight of snow. Aaaaaaand in 3rd rail areas the bigger issue is often the tendency for Desiro stock (notably South West Trains 444/450s) to burst into flames once they ingest a bit of snow. You wanted a geek off, right?! 😉
The ‘duty to get you there’ is a bit of an irrelevance, it’s about convenience and delay potential. If he ends up 12 hours late on a bus he may as well have driven.