
Exhibition hall (Olympia, Earls Court c.1960) photo by Norman Tarling. PEST stands for pump emergency salvage tender. Note front mounted 1000gpm pump. 300 gall tank, EPCO hydraulic gear. Based at Colchester. Full details in Fire Engines of Eastern England page 82.
The photo shows quite clearly how the two door cab had the OIC's seat in the centre, with two side bench seats facing each other for the rest of the crew. This layout enabled everyone to access the center aisle body, like a classic ET of this era, and you can in fact see one man standing back there.
It had a set of back doors, too, just like other ETs in the sixties, but I am surprised they found room for a 300 gallon water tank - were there perhaps actually two smaller ones, either side of the aisle, like Leeds' unique F8s? See also
www.fire-engine-photos.com/picture/number38254.asp