In 1989, to celebrate the 100th anniversary of the opening of the Metropolitan to Chesham, the first Steam on the Met event took place with London Underground running two weekends of steam specials between Chesham and Watford.
For at fejre 100 års jubilæet for åbningen af Metropolitan til Chesham i 1989, fandt det første Steam on the Met-event sted, hvor London Underground i to weekender kørte med dampsærtog mellem Chesham og Watford.