4mm scale etched brass conversion sides for HST MK 3 Trailer Guard Standard (TGS 44000 - 101), with Central Door Locking. This kit will model the TGS seen in all HST trains - East Coast, West Coast, Great Western Main Line and Cross Country. An authentic model can be recreated by converting onto a Hornby MK 3 TSO coach only (for correct style seats). Full instructions enclosed.