| No. | Class | F.M. Whyte | Gauge | Railroad Line | Location | Status | Builder Info | Notes |
|---|---|---|---|---|---|---|---|---|
| 9 (1213) | 0-6-2T | 23¾" | Vale of Rheidol Railway | Vale of Rheidol Railway, Aberystwyth, WAL | operational | Davies & Metcalfe, 1902 | Named Prince of Wales. | |
| 99.3553 | 0-6-2WT+T | 23¾" | Mecklenburg-Pommersche Schmalspurbahn | Vale of Rheidol Railway, Aberystwyth, WAL | display | Arnold Jung Lokomotivfabrik #1261, 1908 | Named Graf Schwerin-Lowitz. From the Brecon Mountain Railway, Merthyr Tydfil. | |
| 8 | 2-6-2T | 23¾" | GWR | Vale of Rheidol Railway, Aberystwyth, WAL | operational | GWR Swindon Works, 1923 | Named Llywelyn. | |
| 3 | 2-4-4T | 23¾" | Brecon Mountain Railway, Merthyr Tydfil, WAL | construction | Brecon Mountain Railway | Working from original drawings of former Sandy River and Rangeley Lakes Railroad locomotive 10 (works number 42231) of 1916. | ||
| 1 (26) | 2-6-2 | 23¾" | Brecon Mountain (Mogyana Railway) | Brecon Mountain Railway, Merthyr Tydfil, WAL | operational | Baldwin #15511, 10/1897 | Named Santa Teresa. Built as a 2-6-0. Sold to Santa Teresa Sugar Mill, Brazil and regauged to 2'-6'. To the UK in 1990. An attempt was made to regauge back to 1'-11 3/4' but aborted. Acquired by the BMR in 2002. Restored to full working order in 2019. | |
| 4 | 2-6-2 | 23¾" | Brecon Mountain Railway, Merthyr Tydfil, WAL | construction | Brecon Mountain Railway | Working from original drawings of former Sandy River and Rangeley Lakes Railroad locomotive 23 (works number 40733) of 1913. | ||
| 2 | 4-6-2 | 23¾" | Eastern Province Cement Works | Brecon Mountain Railway, Merthyr Tydfil, WAL | operational | Baldwin #61269, 03/1930 |