Each new seat can be described as a combination of parts of old seats. These tables show this decomposition. The winner of the old seat at the 2019 election is shown by party colour, as is the implied winner of the new seat.
The implied results are calculated using the local election results for the wards which make up each old seat. This should give the most accurate projection, since it reflects varying political behaviour across the seat.
| Party | Old Seats | New Seats | Change | Disappear | Switch Out | Switch In | Fresh |
|---|---|---|---|---|---|---|---|
| CON | 26 | 27 | 1 | -1 | -1 | 2 | 1 |
| LAB | 28 | 27 | -1 | -1 | -2 | 1 | 1 |
| LIB | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Brexit | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Green | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| MIN | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Total | 54 | 54 | 0 | -2 | -3 | 3 | 2 |
The table shows how the various changes affect each party in this area. The total old and new seats are shown for each party, as well as their difference ('Change'). The change in seats is also explained through the four explanations:
The old seats which are disappearing are: Brigg and Goole; Leeds West.
The old seats which are lost to another party are: Batley and Spen; Dewsbury; Hull West and Hessle.
The new seats which are gained from another party are: Spen Valley; Dewsbury and Batley; Kingston upon Hull West and Haltemprice.
The new seats which are freshly created are: Leeds West and Pudsey; Wakefield and Rothwell.
| New seat | Primary component | Secondary component(s) |
|---|---|---|
| Beverley and Holderness | 89.4% of Beverley and Holderness | |
| Bridlington and the Wolds | 79.3% of Yorkshire East | 10.6% of Beverley and Holderness |
| Brigg and Immingham | 65.9% of Cleethorpes | 21.7% of Brigg and Goole
14.7% of Great Grimsby
|
| Goole and Pocklington | 53.9% of Haltemprice and Howden | 32.6% of Brigg and Goole
20.7% of Yorkshire East
|
| Great Grimsby and Cleethorpes | 85.3% of Great Grimsby | 34.1% of Cleethorpes |
| Hull East | 96.2% of Hull East | 15.1% of Hull North |
| Kingston upon Hull North and Cottingham | 84.9% of Hull North | 19.3% of Haltemprice and Howden
7.9% of Hull West and Hessle
3.8% of Hull East
|
| Kingston upon Hull West and Haltemprice | 92.1% of Hull West and Hessle | 26.8% of Haltemprice and Howden |
| Scunthorpe | 100% of Scunthorpe | 17.8% of Brigg and Goole |
| New seat | Primary component | Secondary component(s) |
|---|---|---|
| Harrogate and Knaresborough | 95.2% of Harrogate and Knaresborough | 0.8% of Selby and Ainsty
0.7% of Skipton and Ripon
|
| Richmond and Northallerton | 88.1% of Richmond | 0.6% of Thirsk and Malton |
| Scarborough and Whitby | Unchanged | |
| Selby | 73.4% of Selby and Ainsty | 20.9% of Elmet and Rothwell |
| Skipton and Ripon | 95.5% of Skipton and Ripon | 1.0% of Selby and Ainsty
0.3% of Harrogate and Knaresborough
|
| Thirsk and Malton | 82.4% of Thirsk and Malton | 11.9% of Richmond |
| Wetherby and Easingwold | 38.9% of Elmet and Rothwell | 24.8% of Selby and Ainsty
16.9% of Thirsk and Malton
4.4% of Harrogate and Knaresborough
3.8% of Skipton and Ripon
0.0% of Leeds East
|
| York Central | 98.6% of York Central | 3.3% of York Outer |
| York Outer | 96.7% of York Outer | 1.4% of York Central |
| New seat | Primary component | Secondary component(s) |
|---|---|---|
| Barnsley North | 89.3% of Barnsley Central | 26.3% of Barnsley East |
| Barnsley South | 73.7% of Barnsley East | 23.4% of Wentworth and Dearne
10.7% of Barnsley Central
|
| Doncaster Central | 95.9% of Doncaster Central | 8.9% of Don Valley |
| Doncaster East and the Isle of Axholme | 63.9% of Don Valley | 27.9% of Brigg and Goole
4.9% of Doncaster North
|
| Doncaster North | 95.1% of Doncaster North | 4.1% of Doncaster Central |
| Penistone and Stocksbridge | Unchanged | |
| Rawmarsh and Conisbrough | 63.4% of Wentworth and Dearne | 27.3% of Don Valley
2.9% of Rother Valley
|
| Rother Valley | 92.2% of Rother Valley | 1.0% of Rotherham |
| Rotherham | 99.0% of Rotherham | 13.3% of Wentworth and Dearne
4.9% of Rother Valley
|
| Sheffield Brightside and Hillsborough | 100% of Sheffield Brightside and Hillsborough | 1.1% of Sheffield Central |
| Sheffield Central | 78.9% of Sheffield Central | 0.0% of Sheffield Hallam |
| Sheffield Hallam | 99.4% of Sheffield Hallam | 4.0% of Sheffield Central
0.3% of Sheffield Heeley
|
| Sheffield Heeley | 88.6% of Sheffield Heeley | 16.0% of Sheffield Central
0.6% of Sheffield Hallam
|
| Sheffield South East | 100% of Sheffield South East | 11.1% of Sheffield Heeley |
| New seat | Primary component | Secondary component(s) |
|---|---|---|
| Bradford East | 97.9% of Bradford East | |
| Bradford South | 100% of Bradford South | 2.1% of Bradford East |
| Bradford West | Unchanged | |
| Calder Valley | 96.4% of Calder Valley | |
| Colne Valley | 84.4% of Colne Valley | |
| Dewsbury and Batley | 53.0% of Dewsbury | 33.3% of Batley and Spen
0.0% of Huddersfield
|
| Halifax | 100% of Halifax | 3.6% of Calder Valley |
| Huddersfield | 95.3% of Huddersfield | 15.5% of Colne Valley |
| Keighley and Ilkley | 100% of Keighley | 0.0% of Shipley |
| Leeds Central and Headingley | 49.1% of Leeds North West | 27.9% of Leeds Central
24.4% of Leeds West
0.0% of Leeds North East
|
| Leeds East | 86.6% of Leeds East | 20.3% of Elmet and Rothwell |
| Leeds North East | Unchanged | |
| Leeds North West | 50.3% of Pudsey | 50.9% of Leeds North West
0.0% of Leeds North East
|
| Leeds South | 71.9% of Leeds Central | 13.4% of Leeds East
0.2% of Morley and Outwood
|
| Leeds South West and Morley | 67.3% of Morley and Outwood | 26.2% of Leeds West
0.2% of Leeds Central
|
| Leeds West and Pudsey | 49.7% of Pudsey | 49.4% of Leeds West |
| Normanton and Hemsworth | 86.2% of Hemsworth | 14.0% of Normanton, Pontefract and Castleford |
| Ossett and Denby Dale | 54.6% of Wakefield | 27.9% of Dewsbury
13.8% of Hemsworth
0.1% of Colne Valley
|
| Pontefract, Castleford and Knottingley | 86.0% of Normanton, Pontefract and Castleford | |
| Shipley | Unchanged | |
| Spen Valley | 66.7% of Batley and Spen | 19.1% of Dewsbury
4.7% of Huddersfield
|
| Wakefield and Rothwell | 45.4% of Wakefield | 32.5% of Morley and Outwood
19.9% of Elmet and Rothwell
|