Indeed, which is what they did. They checked, and there was a charger nearby on their route home.
Just like you'd go to a wedding (say) and not expect to plug in at the venue (which could be at a country house in a rural area, that probably doesn't have a charge point), but you find more charge points on the motorway network. Just like if you fill up with petrol you don't require a petrol station on your doorstep, but fill up when you're passing a filling station.
Even being ultra prepared, nobody can plan for their primary and five backups all being out of action.
Theo