I wonder why the blue beacon lights were mounted so far to the rear of the cab roof? The grille-mounted flashers were probably all that could be seen from the front, and in blind junctions there was nothing to indicate this was an emergency vehicle until it was half way in to the cross street.
Rob .. Livery and style suggests this is/was an RAF/MOD spec appliance for use (presumably) on airfields/secure establishments with 'wide-open' spaces and less likely to have blind junctions. Photo suggests she has a smallish roof mounted monitor. If so, this is likely to have required the beacon(s) to be located aft of the monitor to allow maximum travel and uninterrupted stream .. and to prevent the beacon(s) being wiped off the roof by an enthusiastic operator!
You'll find that this Wagon is used by the MOD and if you notice on the roof that there is a Monitor Fitted.. The Beacons which could be caught in the Swinging from left to right of the monitor or even blown off the beacons when the Water is deployed.
Dave, did these replace the monitor equipped DP1's on Bloodhound sites? Other "Mountain's" had a conventional emergency lighting set up above the crew cab.
Happy New Year!
Added by Graham on 30 December 2009.