💥🚂 Rugged. Powerful. Unmistakable. The Class 37 is one of the true legends of Britain’s railways. Built in the early 1960s by English Electric, these Type 3 diesels became the backbone of British Rail — hauling everything from heavy coal trains in South Wales to express passenger services in Scotland. Nicknamed “tractors” for their unforgettable growling engine sound, Class 37s became a favourite of railfans everywhere. And remarkably, many are still working today — proving just how tough and