[Gerry Chester]

None of the above Owen. These South African manned Vickers Light Tanks (it's a 4 leading) did well against the Italians, even though they were lightly armoured.

Dust was always a problem for tanks in the Western Desert. Under armed can be eliminated as the question posed does so. They did not lack a communication facility having 9 Sets on board.

Having said all that, a clue is linked with one of your answers.

Cheers, Gerry