Well we haven't got very far! Just as we reach our top speed of 40mph on the way out of London, the bus has come to a halt on the hard shoulder. Matt the filmmaker loves the drama, but for the rest of us it's not a good start. After a bit of looking under the bus, it seems we have a serious problem - the inverter has gone and two out of three belts have snapped. My mechanical skills are not up to much, but spare parts for Routemasters are not available in your average Co-op. Plus it's raining. As it happens, Norman our bus driver has access to an empty house up the road in Bexley Heath, so we limp the bus there and set up camp for the night.