Tracing back from the Heaton ecs, the following seems to be a 144.
2Y76 15:40 Sheffield - York
2T26 17:07 York - Leeds
2T27 18:18 Leeds - York
5A60 19+21 York - Heaton
Prior to that is unclear, I suspect the unit for 2Y76 comes off Shrewsbury Road sidings.
The fresh unit off Heaton would appear to work:
2R89 05:40 York - Selby
2P01 06:15 Selby - Scunthorpe
2P02 07:48 Scunthorpe - Doncaster
2P05 08:44 Doncaster - Scunthorpe
2P06 09:48 Scunthorpe - Doncaster
2P09 10:42 Doncaster - Scunthorpe
2P10 11:48 Scunthorpe - Doncaster
2P13 12:42 Doncaster - Scunthorpe
2P14 13:48 Scunthorpe - Doncaster
2P17 14:42 Doncaster - Scunthorpe
2P18 15:48 Scunthorpe - Doncaster
2P23 16:42 Doncaster - Scunthorpe
2P22 17:48 Scunthorpe - Doncaster
2P27 18:42 Doncaster - Scunthorpe
2P26 19:48 Scunthorpe - Doncaster
2P31 20:42 Doncaster - Scunthorpe
2P30 21:48 Scunthorpe - Doncaster joins
2R68 22:23 Adwick - Sheffield
2R27 23:27 Sheffield - Doncaster
I understand the others are all around South Yorkshire. I would expect Gainsborough Central, Scunny, Adwick, Goole/Hull stoppers, Huddersfield, Leeds via both Cas Vegas and Bolton on Dearne.
I understand that Sheffield - Huddersfield is currently 158 due to autumnal adhesion issues with using pacers that way.