Nick has said it all really. Yes, I did notice what seemed to be an unusual amount of fumes coming from the engine room, and further investigation turned up a hose with one end loose. A couple of hours later Clive turned up, offered to murder a cup of tea as usual, and after some prodding declared the problem was a missing air filter, but as it had never been there in the first place it was probably not a real problem.
We had a little daylight left so we headed on into Devizes as the sun set. I was hoping they would follow in the footsteps of Coventry and Banbury by having a statue of the Young Girl from Devizes of the limerick, but apparently not.