'I've got a plan,' Mr Grigg says, when he gets back from walking Arty around the block while I work on my laptop to the beat of high-speed Italian internet on our way to Corfu. I need some light relief. We've been driving through Europe in a heatwave these last few days. A heatwave, and with a hairy, panting dog in the back of the car. This dog, which you would think was crossed with Muppet but is, in fact, pure pedigree, has coped well, especially in her cooling coat. Not so us, though, in traffic jams and searing heat in the busiest week we could ever have chosen in northern Europe. 'Everyone is going on their holidays,' our hostess explains, as we sign in to the latest overnight stop on our way to the ferry at Ancona. 'Anyway,' Mr Grigg says, as we bask in the cool of an air conditioned room. 'We're going to wash the dog, have a shower and then put her to bed. And then we're going out for a bite to eat and then we're cyclin...