The Selby district is much better connected to South and East Yorkshire than it is to North Yorkshire, having been in the West Riding of Yorkshire before 1974. The same applies to the town of Goole, which has no true links with either North Lincolnshire or East Yorkshire. Much of the old Goole constituency outside of Goole ended up forming an integral part of the current Doncaster North!
Now that Sheffield's electorate has shrunk, it is more practicable to have five whole constituencies entirely in Sheffield, and thus to separate Penistone and Stocksbridge. It is worth saying that Stocksbridge should not be combined with Hallam, when it is far better kept with Ecclesfield (which like Stocksbridge has its own parish council), and that Stannington ward should be removed from Sheffield Hallam, which it was not a part of until 2010. Meanwhile, Sheffield Brightside and Sheffield Hillsborough should be separated and largely restored to their previous forms.
Kingston-Upon-Hull, like many medium-sized cities in the UK, has seen substantial expansion into many small towns and villages surrounding it, and in Hull's case that means the Haltemprice area (Cottingham, Hessle, Willerby and Kirk Ella). It is notable that all of these villages have much better road links with Hull than they do with each other, so I do not believe the Boundary Commission's initial version of Kingston-Upon-Hull West & Haltemprice is appropriate even though it is on the right track. Instead, Cottingham should be added to the current Hull North, Hull East should only add Myton ward, and Hull West & Hessle can expand further into Hull's suburbs. This also minimises change in the Hull constituencies. Uniting large towns is also an important factor, hence my creation of revived Barnsley and Doncaster constituencies.
My alternative constituencies for South East Yorkshire are:
Selby & Howden succeeds Selby & Ainsty.
Barnsley succeeds Barnsley Central.
Sheffield Gleadless succeeds Sheffield South East.
Sheffield Brightside succeeds Sheffield Brightside & Hillsborough. It also has polling districts WC, WF and WG from Southey ward, making its actual electorate 74,866.
Sheffield Hillsborough succeeds Penistone & Stocksbridge in practice, restoring the pre-2010 Sheffield Hillsborough constituency. It loses polling districts WC, WF, and WG from Southey ward, making its actual electorate 77,690.
The changed Sheffield Hallam gains polling districts PB, PD, PE, and PF from Graves Park ward, meaning the changed Sheffield Hallam's actual electorate is 75,894 and the changed Sheffield Central's actual electorate is 76,286.
The changed Rotherham constituency contains polling districts JE and JH from Rawmarsh ward, comprising the Rotherham suburb of Parkgate, making its new electorate 73,041 and the changed Don Valley's new electorate 78,037.
Dearne Valley succeeds Doncaster North in practice.
Doncaster succeeds Doncaster Central.
Bridlington has the same boundaries as the current East Yorkshire constituency; the constituency was called Bridlington prior to 1997 and the East Yorkshire epithet was never appropriate, given that East Yorkshire is a whole part of Yorkshire, not merely a district of it.
Beverley & Holderness and Rother Valley are unchanged.
Penistone is a new seat although it is similar to the Barnsley West & Penistone constituency of 1983-2010.
Goole is a new seat that largely restores the old Goole constituency of 1950-83.