It seems to me that the priorities for a rail tour are comfort/food, ambience/interior, destinations and lastly traction. They are quite expensive and have to entertain wives as well.
A high density, 3+2 EMU, with a limited area of travel and capacity limited to 3/4 cars is unlikely to be a regular economic success. The 4CIG's were an opportunity missed (although they form much of the Brighton Belle) but we do have 4TC units. If a mark 3 EMU could be fitted with redundant HST 2+2 seating, tables and a food offering, then a route among the wires might be practicable, perhaps more so for a class 319. A class 769 (when it works) would make even more sense as it would have a wide range and much lower costs than anything locomotive hauled.
Preserved EMU's should look to battery adaptations on heritage lines where steam is not always necessary.
WAO
A high density, 3+2 EMU, with a limited area of travel and capacity limited to 3/4 cars is unlikely to be a regular economic success. The 4CIG's were an opportunity missed (although they form much of the Brighton Belle) but we do have 4TC units. If a mark 3 EMU could be fitted with redundant HST 2+2 seating, tables and a food offering, then a route among the wires might be practicable, perhaps more so for a class 319. A class 769 (when it works) would make even more sense as it would have a wide range and much lower costs than anything locomotive hauled.
Preserved EMU's should look to battery adaptations on heritage lines where steam is not always necessary.
WAO