These models all represent prototypes that either operate on, or have visited, the Welshpool and Llanfair Light Railway. Seirra Leone Railways No.85 was built by Hunslet, and is currently awaiting restoration. Joan was built by Kerr, Stuart and Co and is awaiting a 10-year overhaul. Both were built for export, but were since repatriated to support service on the preserved line. Bowaters Barretto 'Superb' also visited in 2018.