The number '250' in its name was intended to indicate a gross loaded weight of 2½ long (British) tons, implying a substantial carrying capacity of 22 cwt.

[2] When road tested by Britain's Autocar magazine, a 250 JU vehicle converted into a 4,180 lb (1.90 t) motor home achieved a maximum speed of 58 mph (93 km/h).

[1] The testers thought the van a big improvement over the J2 which it replaced, but found it remained "clumsy to drive" with the "need for constant expertise to overcome its faults".

It was then rebadged again in 1970 as the 'Austin Morris 250 JU', finally ending production with the introduction of the Leyland Sherpa, with which it shared some components, in 1974.

In addition to the standard panel vans, 250 JU chassis were also made available to specialist manufacturers for conversion into motor homes.