This company was primarily an agricultural machine manufacturer - but they also made trolleybus chassis.
http://en.wikipedia.org/wiki/Ransomes,_Sims_%26_Jefferies
A 38-seater single-deck trolley bus with
Park Royal metal body (Body No. B31688) mounted on Ransomes, Sims and Jefferies chassis. It is one
of a fleet of fourteen (delivered very slowly in 1947/8) operated in Trinidad, British West Indies, by the Port of Spain
Electricity Board (Information courtesy of
Michael Neal).
Click here for a hand coloured 'advert-version' of the external photograph.