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 | 32 | 33 | 1 | -2 | -1 | 3 | 1 |
| LAB | 42 | 40 | -2 | -2 | -2 | 1 | 1 |
| LIB | 1 | 0 | -1 | 0 | -1 | 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 | 75 | 73 | -2 | -4 | -4 | 4 | 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: Denton and Reddish; Penrith and The Border; Wirral South; Wyre and Preston North.
The old seats which are lost to another party are: Heywood and Middleton; Lancaster and Fleetwood; Westmorland and Lonsdale; Wirral West.
The new seats which are gained from another party are: Heywood and Middleton North; Lancaster and Wyre; Westmorland and Lonsdale; Wirral West.
The new seats which are freshly created are: Cheshire Mid; Manchester Rusholme.
| New seat | Primary component | Secondary component(s) |
|---|---|---|
| Altrincham and Sale West | Unchanged | |
| Blackley and Middleton South | 60.8% of Blackley and Broughton | 19.5% of Heywood and Middleton
11.6% of Manchester Central
|
| Gorton and Denton | 50.6% of Manchester Gorton | 39.4% of Denton and Reddish
11.8% of Manchester Withington
|
| Manchester Central | 50.3% of Manchester Central | 22.8% of Ashton under Lyne
16.2% of Blackley and Broughton
|
| Manchester Rusholme | 38.1% of Manchester Central | 44.7% of Manchester Gorton |
| Manchester Withington | 88.2% of Manchester Withington | 4.8% of Manchester Gorton |
| Salford | 77.2% of Salford and Eccles | 11.2% of Blackley and Broughton |
| Stretford and Urmston | Unchanged | |
| Worsley and Eccles | 64.6% of Worsley and Eccles South | 22.8% of Salford and Eccles
12.8% of Leigh
|
| Wythenshawe and Sale East | Unchanged |
| New seat | Primary component | Secondary component(s) |
|---|---|---|
| Cheshire Mid | 39.0% of Eddisbury | 36.4% of Weaver Vale
13.9% of Congleton
5.4% of Tatton
|
| Chester North and Neston | 73.8% of Chester, City of | 24.1% of Ellesmere Port and Neston |
| Chester South and Eddisbury | 56.7% of Eddisbury | 24.5% of Chester, City of
9.8% of Weaver Vale
5.6% of Crewe and Nantwich
|
| Congleton | 86.1% of Congleton | 0.3% of Eddisbury |
| Crewe and Nantwich | 94.4% of Crewe and Nantwich | 0.7% of Eddisbury |
| Ellesmere Port and Bromborough | 68.3% of Ellesmere Port and Neston | 40.3% of Wirral South |
| Macclesfield | Unchanged | |
| Runcorn and Helsby | 52.6% of Weaver Vale | 33.7% of Halton
7.6% of Ellesmere Port and Neston
3.3% of Eddisbury
1.7% of Chester, City of
|
| Tatton | 94.6% of Tatton | 11.5% of Warrington South
1.2% of Weaver Vale
|
| Warrington North | 99.8% of Warrington North | 0.0% of Warrington South |
| Warrington South | 88.5% of Warrington South | 0.2% of Warrington North |
| Widnes and Halewood | 66.3% of Halton | 21.9% of Garston and Halewood
7.5% of St Helens South and Whiston
0.0% of Knowsley
|
| New seat | Primary component | Secondary component(s) |
|---|---|---|
| Barrow and Furness | 100% of Barrow and Furness | 12.8% of Copeland |
| Carlisle | 90.6% of Carlisle | 26.4% of Penrith and The Border |
| Penrith and Solway | 57.6% of Workington | 43.4% of Penrith and The Border
10.5% of Copeland
9.4% of Carlisle
|
| Westmorland and Lonsdale | 77.9% of Westmorland and Lonsdale | 30.3% of Penrith and The Border |
| Whitehaven and Workington | 76.7% of Copeland | 42.4% of Workington |
| New seat | Primary component | Secondary component(s) |
|---|---|---|
| Ashton under Lyne | 77.2% of Ashton under Lyne | 29.0% of Denton and Reddish |
| Cheadle | Unchanged | |
| Hazel Grove | 100% of Hazel Grove | 16.2% of Stockport |
| Heywood and Middleton North | 80.5% of Heywood and Middleton | 10.3% of Rochdale |
| Oldham East and Saddleworth | Unchanged | |
| Oldham West, Chadderton and Royton | 100% of Oldham West and Royton | |
| Rochdale | 89.7% of Rochdale | |
| Stalybridge and Hyde | Unchanged | |
| Stockport | 83.8% of Stockport | 31.5% of Denton and Reddish |
| New seat | Primary component | Secondary component(s) |
|---|---|---|
| Blackburn | 97.4% of Blackburn | 0.5% of Rossendale and Darwen |
| Blackpool North and Fleetwood | 69.6% of Blackpool North and Cleveleys | 27.9% of Lancaster and Fleetwood
15.9% of Wyre and Preston North
|
| Blackpool South | 100% of Blackpool South | 30.4% of Blackpool North and Cleveleys |
| Burnley | 100% of Burnley | 15.9% of Pendle |
| Chorley | 95.6% of Chorley | |
| Fylde | 92.5% of Fylde | 16.3% of Wyre and Preston North |
| Hyndburn | Unchanged | |
| Lancashire West | Unchanged | |
| Lancaster and Wyre | 66.8% of Lancaster and Fleetwood | 24.4% of Wyre and Preston North
14.9% of Morecambe and Lunesdale
|
| Morecambe and Lunesdale | 85.1% of Morecambe and Lunesdale | 22.1% of Westmorland and Lonsdale
5.3% of Lancaster and Fleetwood
|
| Pendle and Clitheroe | 84.1% of Pendle | 26.9% of Ribble Valley |
| Preston | 99.6% of Preston | 12.5% of Wyre and Preston North
7.5% of Fylde
|
| Ribble South | 82.4% of Ribble South | 7.6% of Ribble Valley
4.4% of Chorley
|
| Ribble Valley | 65.5% of Ribble Valley | 30.9% of Wyre and Preston North
0.4% of Preston
|
| Rossendale and Darwen | 99.5% of Rossendale and Darwen | 2.6% of Blackburn |
| New seat | Primary component | Secondary component(s) |
|---|---|---|
| Birkenhead | 100% of Birkenhead | 20.8% of Wirral South |
| Bootle | Unchanged | |
| Knowsley | 81.2% of Knowsley | 3.2% of St Helens South and Whiston |
| Liverpool Garston | 78.1% of Garston and Halewood | 16.8% of Liverpool Wavertree |
| Liverpool Riverside | 63.1% of Liverpool Riverside | 31.4% of Liverpool Walton |
| Liverpool Walton | 68.6% of Liverpool Walton | 34.0% of Liverpool West Derby
7.9% of Sefton Central
|
| Liverpool Wavertree | 65.4% of Liverpool Wavertree | 36.9% of Liverpool Riverside |
| Liverpool West Derby | 66.0% of Liverpool West Derby | 18.8% of Knowsley
17.8% of Liverpool Wavertree
|
| Sefton Central | 92.1% of Sefton Central | 14.4% of Southport |
| Southport | 85.6% of Southport | 17.6% of Ribble South |
| St Helens North | Unchanged | |
| St Helens South and Whiston | 89.2% of St Helens South and Whiston | |
| Wallasey | 100% of Wallasey | 11.2% of Wirral West |
| Wirral West | 88.8% of Wirral West | 38.9% of Wirral South |
| New seat | Primary component | Secondary component(s) |
|---|---|---|
| Bolton North East | 100% of Bolton North East | 14.0% of Bolton South East |
| Bolton South and Walkden | 71.6% of Bolton South East | 35.4% of Worsley and Eccles South |
| Bolton West | 85.0% of Bolton West | 14.4% of Bolton South East |
| Bury North | 100% of Bury North | 11.6% of Bury South |
| Bury South | 88.4% of Bury South | 11.8% of Blackley and Broughton |
| Leigh and Atherton | 84.5% of Leigh | 15.0% of Bolton West |
| Makerfield | 100% of Makerfield | 2.7% of Leigh |
| Wigan | Unchanged |