Damaged rail under carriage.. The Tri-ang Triang British Rail Composite Coach R29 M24001 in OO Gauge is a replica of a British Railways Mark 1 coach from the mid-20th century. This model captures the essence of the British Railways Steam Era with its multicoloured livery and 1:76 scale size. Perfect for collectors and model railway enthusiasts, this coach is a charming addition to any railway layout, depicting a piece of British railway history in a detailed and accurate manner.