The implied results are now calculated using the local election results for the wards which make up each old seat. This should be more accurate than the earlier implied results which assumed each constituency was homogeneous.
The two main changes in North Yorkshire are that the new seat of Selby and Ainsty is predicted to be a Conservative seat (as at May 2005), rather than the old Labour seat of Selby, and that the new seat of York Outer is predicted to be Lib Dem rather than Conservative. In West Yorkshire, Labour loses the old seat of Normanton which has been fragmented between new seats.
| New seat | Primary component | Secondary component | ||
| Harrogate and Knaresborough | 100% of Harrogate and Knaresborough | 6.3% of Vale of York
5.0% of Skipton and Ripon | ||
| Richmond | 100% of Richmond | 11.0% of Vale of York | ||
| Scarborough and Whitby | Unchanged | |||
| Selby and Ainsty | 76.9% of Selby | 10.2% of Vale of York
2.0% of Skipton and Ripon | ||
| Skipton and Ripon | 93.0% of Skipton and Ripon | 5.0% of Vale of York | ||
| Thirsk and Malton | 73.8% of Ryedale | 33.6% of Vale of York | ||
| York Central | 87.0% of York, City Of | |||
| York Outer | 33.8% of Vale of York | 26.2% of Ryedale
23.1% of Selby 13.0% of York, City Of |
| New seat | Primary component | Secondary component | ||
| Batley and Spen | 94.6% of Batley and Spen | 22.4% of Dewsbury | ||
| Bradford East | 89.7% of Bradford North | 11.3% of Bradford West
4.1% of Bradford South | ||
| Bradford South | 95.0% of Bradford South | 3.0% of Bradford North
0.2% of Bradford West | ||
| Bradford West | 88.4% of Bradford West | 5.1% of Shipley
2.9% of Bradford North 1.0% of Bradford South | ||
| Calder Valley | 99.6% of Calder Valley | 0.3% of Halifax | ||
| Colne Valley | 99.9% of Colne Valley | 5.1% of Huddersfield | ||
| Dewsbury | 77.6% of Dewsbury | 33.1% of Wakefield
5.4% of Batley and Spen 0.1% of Huddersfield | ||
| Elmet and Rothwell | 85.4% of Elmet | 20.8% of Morley and Rothwell
3.2% of Leeds North East 0.1% of Leeds East | ||
| Halifax | 99.7% of Halifax | 0.4% of Calder Valley | ||
| Hemsworth | 98.9% of Hemsworth | 3.3% of Normanton
2.6% of Wakefield | ||
| Huddersfield | 94.8% of Huddersfield | 5.3% of Wakefield
0.1% of Colne Valley | ||
| Keighley | Unchanged | |||
| Leeds Central | 87.3% of Leeds Central | 13.0% of Morley and Rothwell
11.7% of Leeds East 4.7% of Leeds North West 2.1% of Leeds West | ||
| Leeds East | 87.6% of Leeds East | 14.6% of Elmet
8.3% of Leeds Central | ||
| Leeds North East | 96.8% of Leeds North East | 5.8% of Leeds North West
1.0% of Leeds Central 0.7% of Leeds East | ||
| Leeds North West | 84.7% of Leeds North West | 7.0% of Pudsey | ||
| Leeds West | 97.8% of Leeds West | 3.4% of Leeds Central
2.1% of Leeds North West 1.4% of Pudsey | ||
| Morley and Outwood | 66.3% of Morley and Rothwell | 34.5% of Normanton
0.1% of Wakefield | ||
| Normanton, Pontefract and Castleford | 100% of Pontefract and Castleford | 23.8% of Normanton
1.1% of Hemsworth | ||
| Pudsey | 91.7% of Pudsey | 2.7% of Leeds North West
0.2% of Leeds West | ||
| Shipley | 94.9% of Shipley | 4.3% of Bradford North | ||
| Wakefield | 59.0% of Wakefield | 38.4% of Normanton |