If you park a train at platform 4 at Doncaster facing North and after the first girder bridge bear right and you will be on the Doncaster to Cleethorpes branch calling at Kirk Sandal, Stainforth, Thorne South, Crowle, Althorpe, Scunthorpe, where you can amble around the steel works, Barnetby, where you can reverse and go to the Lincoln stations and on to Newark where you can rejoin the ECML, Brooklesby, where you can go up the Barton upon Humber line to New Holland Pier or to Immingham docks, Habrough, Stallingborough, Healing, East Marsh sidings, which lead to Grimsby Docks or the back line to Immingham, Grimsby Station, Grimsby Docks, branch to East Docks portal, and then on to Cleethorpes, for a candy floss.
Enjoy