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) |
|---|---|---|
| Aylesbury | 86.2% of Aylesbury | 11.7% of Buckingham |
| Beaconsfield | Unchanged | |
| Buckingham | 88.3% of Buckingham | 13.9% of Milton Keynes South
0.0% of Aylesbury
|
| Chesham and Amersham | 100% of Chesham and Amersham | 8.4% of Aylesbury |
| Milton Keynes North | 87.5% of Milton Keynes North | 8.0% of Milton Keynes South |
| Milton Keynes South | 78.1% of Milton Keynes South | 12.5% of Milton Keynes North |
| Wycombe | 100% of Wycombe | 5.4% of Aylesbury |
| New seat | Primary component | Secondary component(s) |
|---|---|---|
| Basildon and Thurrock East | 59.5% of Basildon South and East Thurrock | 49.0% of Basildon and Billericay |
| Billericay and Great Dunmow | 51.0% of Basildon and Billericay | 42.5% of Saffron Walden
12.0% of Maldon
|
| Braintree and Witham | 50.8% of Braintree | 53.9% of Witham |
| Brentwood and Ongar | 97.8% of Brentwood and Ongar | 6.6% of Basildon South and East Thurrock |
| Castle Point | 100% of Castle Point | 11.8% of Basildon South and East Thurrock |
| Chelmsford | Unchanged | |
| Colchester | Unchanged | |
| Epping Forest | 100% of Epping Forest | 2.2% of Brentwood and Ongar |
| Essex North East | 76.7% of Harwich and North Essex | 21.2% of Witham
10.8% of Clacton
|
| Harlow | 100% of Harlow | 7.2% of Saffron Walden |
| Harwich and Clacton | 89.2% of Clacton | 23.3% of Harwich and North Essex |
| Maldon | 88.0% of Maldon | 25.0% of Witham |
| Rayleigh and Wickford | 82.0% of Rayleigh and Wickford | 22.1% of Basildon South and East Thurrock |
| Saffron Walden | 50.3% of Saffron Walden | 49.2% of Braintree |
| Southend East and Rochford | 90.0% of Rochford and Southend East | 18.0% of Rayleigh and Wickford |
| Southend West | 100% of Southend West | 10.0% of Rochford and Southend East |
| Thurrock | Unchanged |
| New seat | Primary component | Secondary component(s) |
|---|---|---|
| Hemel Hempstead | 100% of Hemel Hempstead | 4.3% of St Albans |
| Hertford and Stortford | 89.0% of Hertford and Stortford | 11.2% of Hertfordshire North East |
| Hertfordshire North | 75.8% of Hertfordshire North East | 33.8% of Hitchin and Harpenden |
| Hertfordshire South East | 94.1% of Broxbourne | 11.0% of Hertford and Stortford |
| Hertfordshire South West | Unchanged | |
| Hertsmere | 100% of Hertsmere | 4.8% of Watford |
| St Albans | 95.7% of St Albans | 11.6% of Hitchin and Harpenden |
| Stevenage | 100% of Stevenage | 7.9% of Hertfordshire North East
7.0% of Hitchin and Harpenden
|
| Watford | 95.2% of Watford | |
| Welwyn Hatfield | 100% of Welwyn Hatfield | 5.9% of Broxbourne
5.1% of Hertfordshire North East
|