Started life as 3.5 ton vans, then added makrolon armour up to 7 tons, but forgot to upgrade the brakes, consequently used to be seen in ditches throughout the province. These were replaced by the Leyland-DAF V8 vans (sexy engine).
And finally the late 1990s saw the introduction of the Leyland-DAF 45 - a souped-up 7.5 tonne truck. This was percieved by some as the biggest let down of EOD.
[And here's me thinking that the biggest 'let down' would be getting blown in the opposite direction, i.e. up!]