Yesterday's Great Britain VI demonstrated that it's possible to run a double headed steam train with 10 carriages from Craven Arms to Llandeilo Junction without deisel assistance. And quite late in the day.
Is it feasible to run from Crewe at, say 0830am, to Llandeilo by steam, stopping to pick up at Shrewsbury and Craven Arms, drop the deisel at Craven Arms, pick it up again at Llandeilo Junction AND return to Crewe all in one day?
I think it could be possible provided the steam engines return separately (tender first, or turn on a triangle somewhere), and the main train returns with the deisel to Shrewsbury and Crewe, timed for 90mph where permissible.
Is it feasible to run from Crewe at, say 0830am, to Llandeilo by steam, stopping to pick up at Shrewsbury and Craven Arms, drop the deisel at Craven Arms, pick it up again at Llandeilo Junction AND return to Crewe all in one day?
I think it could be possible provided the steam engines return separately (tender first, or turn on a triangle somewhere), and the main train returns with the deisel to Shrewsbury and Crewe, timed for 90mph where permissible.