Inspired by the 0334 Chester to Manchester Airport service that has just departed - (before I've gone to bed ;P) that appears to be run simply as an empty to get it to the Airport for ATW's ultra-early morning path from there out to North Wales - which runs in passenger service presumably because it carries a Chester driver and guard and the unit, a 175, is based there. So running the service costs ATW almost nothing marginally, and they might get some revenue if anyone is ever on it - although I do have to wonder if anyone ever is onboard, given it doesn't stop anywhere, not even Stockport. There might be Piccadilly - Airport custom, of course, although there is a service only a few minutes before from Liverpool (today that's bustiuted though).
So are there any other cases of a train and a crew riding around on a 'positioning move' that might have prospective passengers? The 0354 Nottingham to Liverpool goes further and departs later than the Chester service, so it might sound like a more useful candidate. Unfortunately it couldn't serve Sheffield without taking a lot more time, and thusly having to leave Nottingham earlier, which might cost EMT more for almost no gain. But assuming it already carries a driver and a guard it could still operate as a train for Piccadilly - Liverpool. If there might be someone who wants to go from Chester to Manchester at 0334, there is probably a similar chance someone wants to go there from Nottingham at 0356!
Of course, they aren't necessarily practical in all cases and there may be a very good reason why they are empty at present, interesting comparison nonetheless.
So are there any other cases of a train and a crew riding around on a 'positioning move' that might have prospective passengers? The 0354 Nottingham to Liverpool goes further and departs later than the Chester service, so it might sound like a more useful candidate. Unfortunately it couldn't serve Sheffield without taking a lot more time, and thusly having to leave Nottingham earlier, which might cost EMT more for almost no gain. But assuming it already carries a driver and a guard it could still operate as a train for Piccadilly - Liverpool. If there might be someone who wants to go from Chester to Manchester at 0334, there is probably a similar chance someone wants to go there from Nottingham at 0356!
Of course, they aren't necessarily practical in all cases and there may be a very good reason why they are empty at present, interesting comparison nonetheless.