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 | 21 | 21 | 0 | -2 | 0 | 2 | 0 |
| LAB | 49 | 44 | -5 | -5 | -2 | 0 | 2 |
| LIB | 3 | 3 | 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 | 73 | 68 | -5 | -7 | -2 | 2 | 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: Chelsea and Fulham; Dulwich and West Norwood; Erith and Thamesmead; Finchley and Golders Green; Hackney North and Stoke Newington; Leyton and Wanstead; Poplar and Limehouse.
The old seats which are lost to another party are: Croydon Central; Eltham.
The new seats which are gained from another party are: Croydon South East; Eltham and East Wickham.
The new seats which are freshly created are: Leyton and Stratford; Shoreditch and Bethnal Green.
| New seat | Primary component | Secondary component(s) |
|---|---|---|
| Barking and Beckton | 82.5% of Barking | 16.2% of East Ham |
| Dagenham and Rainham | 90.6% of Dagenham and Rainham | 17.5% of Barking |
| New seat | Primary component | Secondary component(s) |
|---|---|---|
| Chipping Barnet | 76.5% of Chipping Barnet | 27.8% of Finchley and Golders Green |
| Finchley and Enfield Southgate | 58.2% of Enfield Southgate | 30.2% of Finchley and Golders Green
23.5% of Chipping Barnet
|
| Hendon | 100% of Hendon | 13.4% of Finchley and Golders Green |
| New seat | Primary component | Secondary component(s) |
|---|---|---|
| Bexley and Sidcup | 75.3% of Old Bexley and Sidcup | 37.9% of Bexleyheath and Crayford |
| Erith and Crayford | 62.1% of Bexleyheath and Crayford | 56.6% of Erith and Thamesmead |
| New seat | Primary component | Secondary component(s) |
|---|---|---|
| Wembley | 55.7% of Brent North | 44.2% of Brent Central |
| Willesden and Shepherd's Bush | 55.8% of Brent Central | 41.0% of Hammersmith
10.1% of Hampstead and Kilburn
|
| New seat | Primary component | Secondary component(s) |
|---|---|---|
| Beckenham | 63.6% of Beckenham | 44.3% of Lewisham West and Penge |
| Bromley and Chislehurst | 81.8% of Bromley and Chislehurst | 36.4% of Beckenham |
| Orpington | 100% of Orpington | 18.2% of Bromley and Chislehurst |
| New seat | Primary component | Secondary component(s) |
|---|---|---|
| Camden and St Pancras | 75.1% of Holborn and St Pancras | 23.0% of Islington North |
| Hampstead | 65.4% of Hampstead and Kilburn | 28.6% of Finchley and Golders Green
9.5% of Holborn and St Pancras
|
| New seat | Primary component | Secondary component(s) |
|---|---|---|
| Cities of London and Westminster | 90.7% of Cities of London and Westminster | 15.4% of Holborn and St Pancras
19.5% of Westminster North
|
| Paddington and Queen's Park | 80.5% of Westminster North | 24.5% of Hampstead and Kilburn
9.3% of Cities of London and Westminster
|
| New seat | Primary component | Secondary component(s) |
|---|---|---|
| Croydon South East | 72.1% of Croydon Central | 23.6% of Croydon South |
| Croydon South West | 76.4% of Croydon South | 14.3% of Croydon Central |
| Norwood and Thornton Heath | 61.8% of Croydon North | 24.4% of Dulwich and West Norwood
13.6% of Croydon Central
|
| New seat | Primary component | Secondary component(s) |
|---|---|---|
| Ealing Central and Acton | 87.3% of Ealing Central and Acton | 14.4% of Ealing Southall |
| Ealing North and Sudbury | 74.2% of Ealing North | 21.9% of Brent North |
| Southall and Heston | 72.3% of Ealing Southall | 39.9% of Feltham and Heston |
| New seat | Primary component | Secondary component(s) |
|---|---|---|
| Edmonton | 100% of Edmonton | 14.5% of Enfield Southgate |
| Enfield | 100% of Enfield North | 14.8% of Enfield Southgate |
| New seat | Primary component | Secondary component(s) |
|---|---|---|
| Eltham and East Wickham | 100% of Eltham | 24.7% of Old Bexley and Sidcup |
| Woolwich | 70.5% of Greenwich and Woolwich | 43.4% of Erith and Thamesmead |
| New seat | Primary component | Secondary component(s) |
|---|---|---|
| Hackney | 53.9% of Hackney South and Shoreditch | 48.5% of Hackney North and Stoke Newington |
| Shoreditch and Bethnal Green | 47.7% of Bethnal Green and Bow | 46.1% of Hackney South and Shoreditch
8.0% of Hackney North and Stoke Newington
|
| New seat | Primary component | Secondary component(s) |
|---|---|---|
| Hammersmith and Fulham | 59.0% of Hammersmith | 64.4% of Chelsea and Fulham |
| New seat | Primary component | Secondary component(s) |
|---|---|---|
| Hornsey | 90.8% of Hornsey and Wood Green | 12.4% of Enfield Southgate |
| Tottenham | 100% of Tottenham | 9.2% of Hornsey and Wood Green |
| New seat | Primary component | Secondary component(s) |
|---|---|---|
| Harrow North | 57.4% of Harrow East | 55.2% of Harrow West |
| Harrow South and Kenton | 44.8% of Harrow West | 42.6% of Harrow East
22.4% of Brent North
|
| New seat | Primary component | Secondary component(s) |
|---|---|---|
| Hornchurch and Upminster | Unchanged | |
| Romford | 100% of Romford | 9.4% of Dagenham and Rainham |
| New seat | Primary component | Secondary component(s) |
|---|---|---|
| Hayes and Harlington | 100% of Hayes and Harlington | 12.6% of Uxbridge and South Ruislip |
| Ruislip, Northwood and Pinner | Unchanged | |
| Uxbridge and Northolt | 87.4% of Uxbridge and South Ruislip | 25.8% of Ealing North |
| New seat | Primary component | Secondary component(s) |
|---|---|---|
| Feltham and Hounslow | 60.1% of Feltham and Heston | 31.2% of Brentford and Isleworth |
| Isleworth, Brentford and Chiswick | 68.8% of Brentford and Isleworth | 12.7% of Ealing Central and Acton
13.3% of Ealing Southall
|
| New seat | Primary component | Secondary component(s) |
|---|---|---|
| Finsbury Park and Stoke Newington | 64.7% of Islington North | 43.5% of Hackney North and Stoke Newington |
| Islington South and Finsbury | 100% of Islington South and Finsbury | 12.3% of Islington North |
| New seat | Primary component | Secondary component(s) |
|---|---|---|
| Kensington and Chelsea | 100% of Kensington | 35.6% of Chelsea and Fulham |
| New seat | Primary component | Secondary component(s) |
|---|---|---|
| Kingston and Surbiton | Unchanged |
| New seat | Primary component | Secondary component(s) |
|---|---|---|
| Brixton and Vauxhall | 87.1% of Vauxhall | 13.9% of Dulwich and West Norwood |
| Streatham and Brixton Hill | 76.7% of Streatham | 25.8% of Dulwich and West Norwood |
| New seat | Primary component | Secondary component(s) |
|---|---|---|
| Dulwich and Sydenham | 55.7% of Lewisham West and Penge | 35.9% of Dulwich and West Norwood
11.8% of Camberwell and Peckham
|
| Greenwich and Deptford | 57.1% of Lewisham Deptford | 29.5% of Greenwich and Woolwich
28.6% of Lewisham East
|
| Lewisham and Catford | 71.4% of Lewisham East | 42.9% of Lewisham Deptford |
| New seat | Primary component | Secondary component(s) |
|---|---|---|
| Mitcham and Norbury | 69.9% of Mitcham and Morden | 38.2% of Croydon North |
| Wimbledon | 100% of Wimbledon | 13.8% of Putney
9.8% of Mitcham and Morden
|
| New seat | Primary component | Secondary component(s) |
|---|---|---|
| East Ham | 83.8% of East Ham | 10.1% of West Ham |
| Leyton and Stratford | 43.5% of West Ham | 60.8% of Leyton and Wanstead |
| Poplar and Canning Town | 46.4% of West Ham | 49.7% of Poplar and Limehouse |
| New seat | Primary component | Secondary component(s) |
|---|---|---|
| Ilford North and Wanstead | 88.4% of Ilford North | 27.0% of Leyton and Wanstead |
| Ilford South | Unchanged |
| New seat | Primary component | Secondary component(s) |
|---|---|---|
| Richmond Park | Unchanged | |
| Twickenham | Unchanged |
| New seat | Primary component | Secondary component(s) |
|---|---|---|
| Bermondsey and Old Southwark | 88.2% of Bermondsey and Old Southwark | 8.6% of Camberwell and Peckham |
| Camberwell and Peckham | 79.7% of Camberwell and Peckham | 11.8% of Bermondsey and Old Southwark |
| New seat | Primary component | Secondary component(s) |
|---|---|---|
| Carshalton and Wallington | 100% of Carshalton and Wallington | 10.7% of Sutton and Cheam |
| Sutton and Cheam | 89.3% of Sutton and Cheam | 20.3% of Mitcham and Morden |
| New seat | Primary component | Secondary component(s) |
|---|---|---|
| Stepney and Bow | 52.3% of Bethnal Green and Bow | 50.3% of Poplar and Limehouse |
| New seat | Primary component | Secondary component(s) |
|---|---|---|
| Chingford and Woodford Green | 100% of Chingford and Woodford Green | 11.6% of Ilford North |
| Walthamstow | 100% of Walthamstow | 12.2% of Leyton and Wanstead |
| New seat | Primary component | Secondary component(s) |
|---|---|---|
| Battersea and Clapham | 70.8% of Battersea | 23.3% of Streatham
12.9% of Vauxhall
|
| Putney and Wandsworth Town | 86.2% of Putney | 15.1% of Tooting
14.3% of Battersea
|
| Tooting and Balham | 84.9% of Tooting | 14.9% of Battersea |