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 | 52 | 55 | 3 | 0 | 0 | 0 | 3 |
| LAB | 5 | 5 | 0 | 0 | 0 | 0 | 0 |
| LIB | 1 | 1 | 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 | 58 | 61 | 3 | 0 | 0 | 0 | 3 |
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 new seats which are freshly created are: Harpenden and Berkhamsted; St Neots and Mid Cambridgeshire; Waveney Valley.
| New seat | Primary component | Secondary component(s) |
|---|---|---|
| Bedford | 98.0% of Bedford | 1.0% of Bedfordshire North East |
| Bedfordshire Mid | 80.7% of Bedfordshire Mid | 0.1% of Bedford |
| Bedfordshire North | 79.1% of Bedfordshire North East | 3.9% of Bedfordshire Mid
1.9% of Bedford
|
| Dunstable and Leighton Buzzard | 92.6% of Bedfordshire South West | 0.2% of Luton South |
| Luton North | 100% of Luton North | 7.5% of Luton South |
| Luton South and South Bedfordshire | 92.4% of Luton South | 7.4% of Bedfordshire South West |
| New seat | Primary component | Secondary component(s) |
|---|---|---|
| Cambridge | 92.4% of Cambridge | 0.0% of Cambridgeshire South |
| Cambridgeshire North East | 84.3% of Cambridgeshire North East | |
| Cambridgeshire North West | 75.8% of Cambridgeshire North West | 1.3% of Peterborough |
| Cambridgeshire South | 61.9% of Cambridgeshire South | 17.5% of Cambridgeshire South East
7.6% of Cambridge
|
| Ely and East Cambridgeshire | 66.7% of Cambridgeshire South East | 15.7% of Cambridgeshire North East
5.7% of Cambridgeshire South
|
| Huntingdon | 61.7% of Huntingdon | 24.1% of Cambridgeshire North West |
| Peterborough | 98.7% of Peterborough | 0.1% of Cambridgeshire North West |
| St Neots and Mid Cambridgeshire | 38.3% of Huntingdon | 32.3% of Cambridgeshire South
15.8% of Cambridgeshire South East
|
| New seat | Primary component | Secondary component(s) |
|---|---|---|
| Basildon and Billericay | 100% of Basildon and Billericay | 9.1% of Basildon South and East Thurrock |
| Basildon South and East Thurrock | 88.7% of Basildon South and East Thurrock | 8.8% of Thurrock |
| Braintree | 91.5% of Braintree | 6.1% of Saffron Walden
2.8% of Witham
|
| Brentwood and Ongar | 99.8% of Brentwood and Ongar | |
| Castle Point | 100% of Castle Point | 2.2% of Basildon South and East Thurrock |
| Chelmsford | 94.6% of Chelmsford | |
| Clacton | 100% of Clacton | 7.6% of Harwich and North Essex |
| Colchester | 91.0% of Colchester | 0.7% of Harwich and North Essex |
| Epping Forest | Unchanged | |
| Essex North West | 88.1% of Saffron Walden | |
| Harlow | 100% of Harlow | 5.8% of Saffron Walden
0.2% of Brentwood and Ongar
|
| Harwich and North Essex | 91.7% of Harwich and North Essex | 9.0% of Colchester |
| Maldon | 100% of Maldon | 5.4% of Chelmsford |
| Rayleigh and Wickford | 96.5% of Rayleigh and Wickford | |
| Southend East and Rochford | 89.3% of Rochford and Southend East | 3.5% of Rayleigh and Wickford |
| Southend West and Leigh | 100% of Southend West | 10.7% of Rochford and Southend East |
| Thurrock | 91.2% of Thurrock | |
| Witham | 97.2% of Witham | 8.5% of Braintree |
| New seat | Primary component | Secondary component(s) |
|---|---|---|
| Broxbourne | 94.0% of Broxbourne | 8.3% of Hertford and Stortford |
| Harpenden and Berkhamsted | 47.2% of Hitchin and Harpenden | 35.8% of Hertfordshire South West
8.8% of Hemel Hempstead
|
| Hemel Hempstead | 85.7% of Hemel Hempstead | 8.2% of Hertfordshire South West |
| Hertford and Stortford | 91.7% of Hertford and Stortford | |
| Hertfordshire North East | Unchanged | |
| Hertfordshire South West | 56.1% of Hertfordshire South West | 22.6% of Watford
5.4% of Hemel Hempstead
4.3% of St Albans
|
| Hertsmere | 92.4% of Hertsmere | 6.0% of Broxbourne
0.5% of Welwyn Hatfield
|
| Hitchin | 52.8% of Hitchin and Harpenden | 19.9% of Bedfordshire North East
15.4% of Bedfordshire Mid
|
| St Albans | 95.7% of St Albans | 0.0% of Welwyn Hatfield |
| Stevenage | Unchanged | |
| Watford | 77.4% of Watford | 7.6% of Hertsmere |
| Welwyn Hatfield | 99.5% of Welwyn Hatfield |
| New seat | Primary component | Secondary component(s) |
|---|---|---|
| Broadland and Fakenham | 93.3% of Broadland | |
| Great Yarmouth | Unchanged | |
| Norfolk Mid | 81.6% of Norfolk Mid | 4.6% of Norfolk South West
0.6% of Norfolk South
|
| Norfolk North | 100% of Norfolk North | 1.4% of Broadland |
| Norfolk North West | 99.4% of Norfolk North West | 5.1% of Norfolk South West |
| Norfolk South | 65.2% of Norfolk South | 16.4% of Norfolk Mid |
| Norfolk South West | 90.3% of Norfolk South West | 2.0% of Norfolk Mid
0.6% of Norfolk North West
|
| Norwich North | 100% of Norwich North | 5.3% of Broadland
1.3% of Norwich South
|
| Norwich South | 98.7% of Norwich South | 0.9% of Norfolk South |
| New seat | Primary component | Secondary component(s) |
|---|---|---|
| Bury St Edmunds and Stowmarket | 76.3% of Bury St Edmunds | 10.5% of Suffolk West |
| Ipswich | Unchanged | |
| Lowestoft | 91.2% of Waveney | |
| Suffolk Central and North Ipswich | 81.2% of Suffolk Central and Ipswich North | 6.4% of Bury St Edmunds
1.7% of Suffolk Coastal
|
| Suffolk Coastal | 90.3% of Suffolk Coastal | |
| Suffolk South | 95.4% of Suffolk South | |
| Suffolk West | 89.5% of Suffolk West | 4.6% of Suffolk South
2.0% of Bury St Edmunds
|
| Waveney Valley | 33.3% of Norfolk South | 18.8% of Suffolk Central and Ipswich North
15.3% of Bury St Edmunds
8.8% of Waveney
7.9% of Suffolk Coastal
|