WHEN Hornby reworked its HST power cars with new features and electronics, it decided that an overhaul of the matching Mk.3 slam-door trailers was required to bring them up to the same standard as the newer Mk.3SD sliding door trailers released in 2020.
The result is a range of brand-new coaches with vehicle specific details and all composed of consistent tooling. The former Lima stand-in for the Trailer Guard Standard trailer was
