YAM Range Rover Airport Crash Tender.

The first generation Range Rover served as the base for specialist utility vehicles. These included the Carmichaels International six-wheel Fire Tender. This was a two door model with an extended chassis and a third "lazy" axle added. Designed for small airfield use, it had a water pump mounted on the front bumper driven directly by the V8's crankshaft. The MoD purchased them for the RAF, this version was called the TACR2. Carmichaels was contracted to supply the modified chassis and the fire-fighting body was supplied and mounted by Gloster-Saro. These were four door versions using an internally mounted water pump driven by a gearbox PTO. At least one of these (at Duxford IWM) has been converted into a full 6x6 by linking a drive-through unit to the two rear axles' differentials.

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Source: wikipedia.org