As for the NYMR surely accomodating an hourly DMU in each direction is not beyond their ability? Remember there would be an Act of Parliament for the reopening and compliance with Acts of Parliament is not optional. Not only that but the aforesaid DMU would be packed in the summer months with people coming to spend money on the NYMR.
Why not consider reality, before sounding off online. The NYMR simply does not have the infrastructure to accommodate an extra train in each direction an hour. It is a single line, with only two passing places. Even if you factor in the soon to be added capability to cross Whitby trains at Grosmont, it won't make that much difference. If you start to run your three car TPE DMU in one of the available paths, you loose 7 - 8 Mk 1's full of people, who are off to spend money on the NYMR, or in Whitby. That is called an own goal. You are still not allowing for the non availability of paths to Whitby either. There are only three NYMR services to there per day at the moment, and for good reason. The paths for more do not exist!