Rob, the Mk 9. Although on a Thornycroft chassis Dennis did the plumbing and coachwork. They did a good job as well as most Mk9's saw long service from 1976 onwards. Many are still around on small airfields and the vintage circuit. The engine was a Cummins and it was the first RAF major foam unit to use aspirated and not airblown foam production. Frankly they were bombproof, fireman proof, and built to last. Truly a great machine.
Added by Rob Johnson on 21 June 2013.