i.e. very early morning and late at night are cheaper.
Personally, I'd go for Sunday morning, so if there are complications on the drive south, we have leeway.
I reckon the best compromise would be the 07:57 departure for £79. After 08:00 it jumps to £103
But for sure, this needs to be booked pronto, as the train before is already booked up.
In order to move things along, I propose we reach agreement and get tickets booked by Wednesday of this week.
and while I remember, I'm still toying with the idea of traveling back via ferry from Bilbao. Would take an extra couple of days and cost more though.. Anyone interested?