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 | 10 | 8 | -2 | 0 | -2 | 0 | 0 |
| LAB | 19 | 19 | 0 | -2 | 0 | 2 | 0 |
| LIB | 0 | 0 | 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 | 29 | 27 | -2 | -2 | -2 | 2 | 0 |
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: Blaydon; Tyneside North.
The old seats which are lost to another party are: Blyth Valley; Durham North West.
The new seats which are gained from another party are: Cramlington and Killingworth; Blaydon and Consett.
| New seat | Primary component | Secondary component(s) |
|---|---|---|
| Bishop Auckland | 75.3% of Bishop Auckland | 26.7% of Durham North West |
| Blaydon and Consett | 48.8% of Durham North West | 51.3% of Blaydon |
| Darlington | 100% of Darlington | 5.8% of Sedgefield |
| Durham North | 100% of Durham North | 8.4% of Durham North West |
| Durham, City of | 85.6% of Durham, City of | 16.1% of Durham North West |
| Easington | 100% of Easington | 12.7% of Sedgefield
0.7% of Durham, City of
|
| Newton Aycliffe and Spennymoor | 69.0% of Sedgefield | 24.7% of Bishop Auckland
13.7% of Durham, City of
|
| New seat | Primary component | Secondary component(s) |
|---|---|---|
| Cramlington and Killingworth | 55.3% of Blyth Valley | 31.1% of Tyneside North
12.6% of Tynemouth
4.6% of Newcastle upon Tyne North
|
| Gateshead Central and Whickham | 80.0% of Gateshead | 29.0% of Blaydon |
| Houghton and Sunderland South | 100% of Houghton and Sunderland South | 11.9% of Washington and Sunderland West |
| Jarrow and Gateshead East | 89.4% of Jarrow | 20.0% of Gateshead |
| Newcastle upon Tyne Central and West | 78.2% of Newcastle upon Tyne Central | 42.4% of Newcastle upon Tyne North
2.5% of Newcastle upon Tyne East
|
| Newcastle upon Tyne East and Wallsend | 68.9% of Newcastle upon Tyne East | 41.7% of Tyneside North |
| Newcastle upon Tyne North | 42.8% of Newcastle upon Tyne North | 28.5% of Newcastle upon Tyne East
20.3% of Tyneside North
21.8% of Newcastle upon Tyne Central
|
| South Shields | 100% of South Shields | 10.6% of Jarrow |
| Sunderland Central | Unchanged | |
| Tynemouth | 87.4% of Tynemouth | 6.9% of Tyneside North |
| Washington and Gateshead South | 88.1% of Washington and Sunderland West | 19.7% of Blaydon |
| New seat | Primary component | Secondary component(s) |
|---|---|---|
| Blyth and Ashington | 73.4% of Wansbeck | 44.7% of Blyth Valley |
| Hexham | 100% of Hexham | 10.2% of Newcastle upon Tyne North
5.0% of Berwick-upon-Tweed
2.1% of Wansbeck
|
| Northumberland North | 95.0% of Berwick-upon-Tweed | 24.5% of Wansbeck |
| New seat | Primary component | Secondary component(s) |
|---|---|---|
| Hartlepool | Unchanged | |
| Middlesbrough and Thornaby East | 94.2% of Middlesbrough | 15.5% of Stockton South
2.4% of Middlesbrough South and Cleveland East
|
| Middlesbrough South and East Cleveland | 90.9% of Middlesbrough South and Cleveland East | 5.8% of Middlesbrough |
| Redcar | 100% of Redcar | 6.7% of Middlesbrough South and Cleveland East |
| Stockton North | 95.7% of Stockton North | 7.6% of Stockton South |
| Stockton West | 76.9% of Stockton South | 12.5% of Sedgefield
4.3% of Stockton North
|