Are G4S knowingly trying to get someone killed?

but does that give them the right to ignore traffic regulations? Do they build the cost of getting parking tickets into their financial model, or do traffic wardens just not even bother?

Not all traffic regulations but most likely the one's to do with parking. They couldn't run red light, say. And if the routinely did that then I would be saying "hang the fuckers out to dry". I very much doubt you will see a G4S van get a parking ticket.

Yes they are a private corporation but you have to be very stupid if you can't understand the reasons for them parking as close as possible to their pick up/drop off points. Even if there were three in a van, they would still do this and I would still say it was justified. Can you really say you would gladly walk down Walworth Road, Oxford Street, Shoreditch High Street carrying a box that is very obviously full of used notes???