During the course of A Derailment the description of things that move around on wheels hasn't been easy. In fact it's been downright complicated. There's a distinction between a car, a motorcar, a pre-war Austin, a vehicle, a lorry, a van, a bus, a coach, a train, an underground train and it can go on a little bit. For those not interested in nuances of things that move around on wheels they should all just be called 'motorized transport devices.'
To call something a Bedford SB is what you call a 'pompous ass' moment. It's
kind of like military speak. "I took the four-ten round the squealy and got KP."
Makes no sense at all, unless you know what a four-ten, a squealy and KP might
be. And if you did you'd think it funny, and you'd belong to a language group,
and you'd feel better than the average civilian. So what the hell is a Bedford
SB, I hear you ask. Well it's a kind of bus.