A part of Hornby's 2026 Releases. Mk3 coaches continued to be built until 1988, but multiple units based on the Mk3 body shell were built until the early 1990s. The standard length of a Mk3 coach is 75ft (23m), which is ten feet longer than its predecessor, the Mk2, and is of monocoque construction with an all-welded mild steel stressed skin.