[fv1620]

Tom, well that doesn't look too out of place!

Being tracked & the single missile on the roof (20 malkaras inside) looks like the proposed Heavy Tank Destroyer FV410 weighing in at 46 tons.

Although the waterproof cab & tracks looks like the proposed FV426 Orange William launcher, except the missiles swing out from behind shutters on each side.

So not such a crazy toy after all & remember in the end that it was going to be Hornet that fired Orange William, Malkara was originally only a second option.