It looks like a Geest truck, made by Geest, the same company associated with bananas.
I do not know models, but trucks were manufactured from the 1950s to the 1970s. Addresses were advertised as Geest Industries Limited (Truck Division) Spalding, Lincolnshire, and Marsh Lane Truck Factory, Boston, Lincolnshire
Brian Bell’s book ’70 Years of Garden Machinery’ briefly mentions Geest with Villiers air-cooled engines and three-speed Albion gearboxes as the 10cwt 1.25hp model MT2/1, and the 1 ton 3hp model MT2/3.