Having lived in York and having family from York, I've closely followed this campaign over the years. The line shouldn't have closed but bringing it back will expensive and there doesn't seem a significant appetite or ability to deliver completely new heavy rail lines in the UK.
My opinion on this and a lot of other potential rail reopenings in the UK is that light rail should be considered. The main benefits from that are:
- More opportunity for cheaper at grade infrastructure with roads and footways
- The ability to negotiate higher gradients
- Cost reductions in signalling
- Potential to have on street sections in areas where the alignment has been lost (although that could increase costs)
- The potential to stage construction. A heavy rail line would likely need to be all nothing. A light rail line with potential stops at York Hospital, A64 parkway, Haxby, Stamford Bridge, Pocklington and Pocklington parkway could form a first stage.
Obviously there are drawbacks to light rail such as lower top speed and the need for new depot facilities. A lower speed of 60mph would still be competitive against car, especially going into York and could be offset with additonal stations and improved frequency to improve generalised door to door journey times.
Heavy rail or light rail, the line shouldn't be considering freight. The junction at York points in the wrong direction and ECML capacity out of York station is too constrained. If heavy rail is chosen then designing in a cost effective manner with single track and higher gradient is a must. The line won't have much interaction with the rest of network so doesn't need the flexibility of two tracks throughout. Minimum viable product is a must.