I worked as a driver's mate during the early '80's on Saturday mornings and during my school holidays (when I was a young teenager) on a couple of the Wimbush bread vans rounds - there was a large fleet of bread vans kept inside the bakery - and from what I remember they were all brown BMC/Leyland/Austin FG chassis cabs with an aluminium box body fitted out with racks for the bread baskets - there was also a side loading section just behind the cab where we kept Mr Kipling cakes and fresh cream cakes. All the cabs were brown and the only Wimbush livery was on the box body - I've searched the internet and can't find a single image but the vans looked like the one I've attached.
I'd start the van in the morning for the driver - in those days you'd spend an absolute age turning the engine over on the key until it eventually fired up - I'd then trot off to the driver's canteen for my cup of tea before we all headed back to our various delivery vans. By then the heat and smell from the diesel engines was something else, although in the winter it was toastie in the cab!
The driver had a large leather purse to collect the money from each shop on a Saturday, he'd bring back a thick wodge of cash at the end of the round for the cashier to add up whilst I'd be emptying the van of anything we hadn't sold, or brought back as it was out of date! There were 24 loaves on each tray, unless it had the double size catering loaf!
Most of the returns would go for pigs' swill but I'd always take home bread and fresh cream cakes, and also Mr Kippling cakes to go in our freezer. My Mum loved me!