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) |
|---|---|---|
| Bexleyheath and Erith | 75.0% of Bexleyheath and Crayford | 34.4% of Erith and Thamesmead
12.5% of Old Bexley and Sidcup
|
| Sidcup and Welling | 87.5% of Old Bexley and Sidcup | 25.0% of Bexleyheath and Crayford |
| New seat | Primary component | Secondary component(s) |
|---|---|---|
| Beckenham | 64.5% of Beckenham | 44.1% of Lewisham West and Penge |
| Bromley and Chislehurst | 81.8% of Bromley and Chislehurst | 35.5% of Beckenham |
| Orpington | 100% of Orpington | 18.2% of Bromley and Chislehurst |
| New seat | Primary component | Secondary component(s) |
|---|---|---|
| Croydon East | 86.4% of Croydon Central | 12.6% of Croydon North |
| Croydon North | 87.4% of Croydon North | |
| Croydon South | 76.1% of Croydon South | 13.6% of Croydon Central
11.5% of Carshalton and Wallington
|
| New seat | Primary component | Secondary component(s) |
|---|---|---|
| Ealing Central | 61.8% of Ealing Central and Acton | 24.8% of Ealing North
26.8% of Ealing Southall
|
| Greenford and Northolt | 75.2% of Ealing North | 14.9% of Ealing Southall
11.1% of Brent North
|
| New seat | Primary component | Secondary component(s) |
|---|---|---|
| Eltham and Charlton | 85.4% of Eltham | 29.4% of Greenwich and Woolwich |
| Thamesmead and Plumstead | 65.6% of Erith and Thamesmead | 28.8% of Greenwich and Woolwich
14.6% of Eltham
|
| New seat | Primary component | Secondary component(s) |
|---|---|---|
| Hayes and Feltham | 74.4% of Hayes and Harlington | 31.0% of Feltham and Heston |
| Ruislip, Northwood and Pinner | 69.6% of Ruislip, Northwood and Pinner | 35.6% of Uxbridge and South Ruislip |
| Uxbridge | 64.4% of Uxbridge and South Ruislip | 25.6% of Hayes and Harlington
19.1% of Ruislip, Northwood and Pinner
|
| New seat | Primary component | Secondary component(s) |
|---|---|---|
| Brentford and Isleworth | 89.5% of Brentford and Isleworth | |
| Southall and Heston | 50.0% of Feltham and Heston | 58.4% of Ealing Southall |
| New seat | Primary component | Secondary component(s) |
|---|---|---|
| Kingston and Surbiton | 75.9% of Kingston and Surbiton | 18.4% of Richmond Park |
| New seat | Primary component | Secondary component(s) |
|---|---|---|
| Brixton | 40.0% of Vauxhall | 40.1% of Dulwich and West Norwood
27.2% of Streatham
|
| Clapham and Streatham | 72.8% of Streatham | 24.9% of Dulwich and West Norwood
13.1% of Vauxhall
|
| New seat | Primary component | Secondary component(s) |
|---|---|---|
| Deptford and Rotherhithe | 70.5% of Lewisham Deptford | 30.8% of Bermondsey and Old Southwark
11.1% of Camberwell and Peckham
|
| Greenwich and Lewisham Central | 56.8% of Lewisham East | 41.7% of Greenwich and Woolwich
15.1% of Lewisham Deptford
|
| Lewisham South | 55.9% of Lewisham West and Penge | 43.2% of Lewisham East
14.4% of Lewisham Deptford
|
| New seat | Primary component | Secondary component(s) |
|---|---|---|
| Mitcham and Morden | 100% of Mitcham and Morden | 13.6% of Tooting |
| Wimbledon and Coombe | 88.9% of Wimbledon | 16.7% of Richmond Park
8.1% of Kingston and Surbiton
|
| New seat | Primary component | Secondary component(s) |
|---|---|---|
| Hampton | 63.2% of Twickenham | 19.1% of Feltham and Heston
10.5% of Brentford and Isleworth
|
| Richmond and Twickenham | 64.8% of Richmond Park | 36.8% of Twickenham |
| New seat | Primary component | Secondary component(s) |
|---|---|---|
| Bermondsey and South Bank | 69.2% of Bermondsey and Old Southwark | 22.0% of Camberwell and Peckham
9.4% of Vauxhall
|
| Dulwich and Peckham | 66.9% of Camberwell and Peckham | 35.0% of Dulwich and West Norwood |
| New seat | Primary component | Secondary component(s) |
|---|---|---|
| Carshalton and Coulsdon | 88.5% of Carshalton and Wallington | 23.9% of Croydon South |
| Sutton and Cheam | 100% of Sutton and Cheam | 15.9% of Kingston and Surbiton |
| New seat | Primary component | Secondary component(s) |
|---|---|---|
| Balham and Tooting | 71.4% of Tooting | 29.2% of Battersea |
| Battersea and Vauxhall | 70.8% of Battersea | 37.5% of Vauxhall |
| Putney | 100% of Putney | 15.0% of Tooting
11.1% of Wimbledon
|