6th August 1972
British Rail
(Mystery Excursion)
| Loco Used | 1541 | 
| Stock Used | load 12 | 
Route :
| Loco | Route | 
| 1541 | Leeds - Wortley South Jn - Wakefield Westgate - Hare Park Jn - Adwick Jn - Doncaster - (via ECML) - Peterborough - March - Ely - Cambridge | 
| 1541 | Cambridge - (reverse of outward route) - Wakefield Westgate - Gelderd Road Jn - (via viaduct line) - Leeds | 
Source : Ian Umpleby
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Timings (Booked & Actual)
(from Ian Umpleby)
| M.C | Location | Booked | Actual | Booked | Actual | |
| 0.00 | Leeds | 09.35d | 09.41½ | 20.30a | 20.33½ | |
| 1.28 | Wortley South Jn | ? | 09/46½ | |||
| 1.48 | Gelderd Road Jn | ? | 20/28 | |||
| 10.08 | Wakefield Westgate | ??.??a ~ 09.55d | 09.59 ~ 10.01 | 20.08a ~ ??.??d | 20.11 ~ 20.15 | |
| 14.00 | Hare Park Jn | ? | 10/06½ | ? | 20/05½ | |
| 25.12 | Adwick Jn | ? | 10/17½ | ? | 19/52 | |
| 29.76 | Doncaster | ? | 10c27½ ~ 10c33 | ? | 19c43½ ~ 19c45½ | |
| 38.16 | Bawtry | ? | 10/43½ | ? | 19/34½ | |
| 47.24 | Retford | ? | 10/54½ | ? | 19/28 | |
| 65.64 | Newark North Gate | ? | 11/13 | ? | 19/05½ | |
| 76.16 | Barkston South Jn | ? | 11/25 | ? | 18/55½ | |
| 80.32 | Grantham | ? | 11/29½ | ? | 18/50½ | |
| 85.64 | Stoke Summit | ? | 11/39½ | ? | 18/41 | |
| 101.04 | Tallington | ? | 11/52½ | ? | 18/21½ | |
| 106.32 | Werrington Jn | ? | 11/57 | ? | 18/17½ | |
| 109.44 | Peterborough | ? | 12c08½ ~ 12c10½ | ? | 18c07 ~ 18c12 | |
| 119.32 | Three Horse Shoes | ? | 12/25½ | ? | 17/49½ | |
| 124.36 | March | ? | 12c31½ ~ 12c32 | ? | 17c41 ~ 17c42 | |
| 138.52 | Ely North Jn | ? | 12/48 | ? | 17/24½ | |
| 140.04 | Ely | ? | 12/50 | ? | 17/22 | |
| 149.28 | Waterbeach | ? | 12/59½ | ? | 17/12½ | |
| 154.60 | Cambridge | ??.??a | 13.06½ | 17.05d | 17.06½ | |