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The Austin K2/Y is a British heavy military ambulance that was used by all Commonwealth services during the Second World War. Built by Austin, it was based on the civilian light truck Austin K30, differing mainly by having simple canvas closures in place of driver's cab doors.
The K2/Y could take ten casualties sitting or four stretcher cases. The rear body, known as No. 2 Mk I/L was developed by the Royal Army Medical Corps and built by coachbuilder Mann Egerton. The interior dimensions were approximately 2.6 metres long, 2.0 metres wide and 1.7 metres high. At the rear of the vehicle there were two large doors. From the driver's cab the wounded could also be accessed through a small internal door with a seat. The exterior was mainly made from painted canvas.
One veteran of the North African Campaign stated he once managed to carry 27 wounded, with passengers seated on the wings, bonnet, rear steps, and in extra stretchers suspended by rifles across the rear walkway; he was mentioned in dispatches for this feat.

https://en.wikipedia.org/wiki/Austin_K2/Y