This is used in a number of Hornby locos, check service sheets for compatibility. Could also be used for scenery on layouts. Will need suitable smoke oil (Seuthe or similar).
HORNBY Loco Smoke Generator Unit (12V) - Requires Oil - Also Great For Scenery!
Universal Steam-Smoke Distillate 10ml - Seuthe for Smoke Generator 100ml-99.90€
Triang Hornby OO Gauge X430 Working Sleuth Smoke Generator Pipe With Clip