Interesting old brochures, I own a 1992 bus that looks identical to the last one in your images. It's 190 LWB 3.5 ton, the plate says that it was built by Dormobile. When I bought it, it was a 10 seater bus with tail lift and was operating in the Bury area. I have since stripped it out and have converted it into a campervan, which hopfully will be completed for the Spring.
Here's an old image of the bus when I bought it.
When I learn how to post images, sorry.
1992 (Reg) Mk3 190 LWB Dormobile camper conversion,
with 1999 2.5lt TD 100PS engine, Bosch 146 pump.