TT4012 BR Intercity Mk2E First Open 3234The British Rail Mark 1 coaches were not suitable for higher speed rail services, with the Mark 1 coaches being a perfect complement for steam locomotives that were replaced by diesel and electric locomotives in the 1960s. The Mark 2 coach was introduced in 1964 and was all steel. While the Mark 2 was a progression of the Mark 1, the two shared almost no common parts, and only a passing resemblance. In service, the Mark 2 coaches were commonly seen in