London’s WW2 experiment with coal-powered buses

For a few years, London had an experimental fleet of buses that dragged a trailer behind them burning a unique type of gas, made from burning coal.
It was wartime and imported liquid fuel was expected to be in short supply, so London’s buses looked to something the UK wasn’t short of at the time, and that was coal. Specifically, London’s buses were powered by the gas that was produced from burning coal — known as producer gas.In the days before North Sea gas was discovere