1. The 1936 Trials Leylands were:
a) Leyland Bull Terrier
b) Leyland Retriever [64 having been purchased for workshop lorries]
c) Leyland Cub Demonstrator which was an experimental chassis developed by Leylands to reduce the costs in comparison with the Retriever, with special type of 4-wheeled rear bogie. In 1936 NZ purchased one. This photo appears to fit the bill, as it also has the double-wings over the rear wheels precluding the fitment of chains.
http://www.photoarchives.co.uk/pixcma/04186.jpg
2. The 1938 WD Trials 3-ton 4 x 4s were:
a) Guy Lizard
b) Karrier Spider
c) AEC experimental with Forward Control [COE] and was being fitted with a winch, suitable as a lorry or FAT
d) Crossley experimental
e) Albion E.V.I.N.
The Trials reports for 1936, 1937, 1938 and 1939-40 are fascinating and also show that Marmon-Herrington conversions were tied out starting with Unipowers' Fordson conversion and ending with the 'father of the F60H', and also Garner-Straussler built with Ford components and M-H front wheel drive.
The predecessor of the F60H was a Fordson with a Sussex [dual-wheeled] rear bogie conversion with M-H front drive to produce a 6 x 6 that predated or possibly was contemporary with, the Candian Ford chassis with M-H front-drive and M-H and Thornton rear-drive.
Anyhow, M-H fans that have not seen the Reports will no doubt be interested in the conversions offered in the UK pre-war.