TT4006 BR Mk1 Brake Second E34734Upon nationalisation in 1947 the newly formed British Railways saw the need to standardise their passenger stock, having inherited a patchwork of coaches of all different specifications from each of the big four who were in turn sometimes running a wide variety of stock from their constituent companies. This new coach would have to be perfect for every possible use that the new BR may need it for, which could be tricky when the coach would need to be