No 1, Knebworth Park & Wintergreen Railway, 25 July 1976. Hunslet 0-4-0ST 1429 / 1922. At the time of this photo the former Dinorwic quarry loco was based at Knebworth. It subsequently moved to the Bredgar & Wormshill Railway where it was working in 2018. It is now named Lady Joan. Photo by Les Tindall.