The Mighty GWR 4200 Class – The Workhorses of the Welsh Valleys 🌄 Built for strength, stamina, and sheer pulling power, the GWR 4200 Class were some of the toughest tank engines ever to run on Britain’s railways. Designed specifically for the steep gradients and heavy coal trains of South Wales, these 2-8-0T brutes became the backbone of mineral traffic across the region. With their chunky frames, huge water tanks, and incredible tractive effort, the 4200s were perfectly suited to the demanding