Each new seat can be described as a combination of parts of old seats. These table show this decomposition. The winner of the old seat at the 2010 election is shown by party colour, as is the implied winner of the new seat.
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.
| New seat | Primary component | Secondary component(s) |
|---|---|---|
| Birmingham Edgbaston | 49.3% of Birmingham Hall Green | 24.6% of Birmingham Selly Oak
25.3% of Birmingham Edgbaston
|
| Birmingham Erdington and Castle Bromwich | 100% of Birmingham Erdington | 11.1% of Meriden |
| Birmingham Hall Green | 50.7% of Birmingham Hall Green | 49.9% of Birmingham Selly Oak |
| Birmingham Harborne | 74.7% of Birmingham Edgbaston | 24.5% of Birmingham Northfield
14.5% of Warley
|
| Birmingham Ladywood | 51.0% of Birmingham Ladywood | 49.4% of Birmingham Hodge Hill |
| Birmingham Northfield | 75.5% of Birmingham Northfield | 25.5% of Birmingham Selly Oak |
| Birmingham Perry Barr | 74.8% of Birmingham Perry Barr | 26.1% of Birmingham Ladywood |
| Birmingham Yardley | 78.1% of Birmingham Yardley | 26.1% of Birmingham Hodge Hill |
| Sutton Coldfield | Unchanged |
| New seat | Primary component | Secondary component(s) |
|---|---|---|
| Aldridge, Brownhills and Bloxwich | 81.7% of Aldridge-Brownhills | 40.7% of Walsall North |
| Dudley East and Oldbury | 50.0% of Dudley North | 43.2% of West Bromwich West
17.3% of Dudley South
12.2% of West Bromwich East
|
| Dudley West | 50.0% of Dudley North | 49.7% of Dudley South
29.8% of Wolverhampton South East
|
| Halesowen and Rowley Regis | 100% of Halesowen and Rowley Regis | 14.7% of Stourbridge |
| Smethwick | 85.5% of Warley | 22.9% of Birmingham Ladywood
14.1% of West Bromwich East
|
| Stourbridge and Dudley | 85.3% of Stourbridge | 33.0% of Dudley South |
| Walsall South | 57.9% of Walsall South | 25.2% of Birmingham Perry Barr
18.3% of Aldridge-Brownhills
15.4% of West Bromwich East
|
| Walsall West | 59.3% of Walsall North | 28.0% of Walsall South
28.6% of Wolverhampton North East
|
| Wednesbury | 56.8% of West Bromwich West | 58.2% of West Bromwich East |
| Wolverhampton East | 70.2% of Wolverhampton South East | 41.8% of Wolverhampton North East
14.1% of Walsall South
|
| Wolverhampton West | 100% of Wolverhampton South West | 29.6% of Wolverhampton North East |
| New seat | Primary component | Secondary component(s) |
|---|---|---|
| Coventry North East | Unchanged | |
| Coventry North West | Unchanged | |
| Coventry South | Unchanged | |
| Kenilworth and Dorridge | 46.0% of Kenilworth and Southam | 25.0% of Solihull
22.8% of Meriden
9.7% of Stratford-on-Avon
|
| Meriden | 66.0% of Meriden | 24.5% of Birmingham Hodge Hill |
| Solihull | 75.0% of Solihull | 21.9% of Birmingham Yardley |