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) |
|---|---|---|
| Bodmin and St Austell | 62.0% of St Austell and Newquay | 43.9% of Cornwall North
0.5% of Cornwall South East
|
| Cornwall South East | 99.5% of Cornwall South East | 4.4% of Cornwall North
3.3% of St Austell and Newquay
|
| Falmouth and Camborne | 75.6% of Camborne and Redruth | 38.6% of Truro and Falmouth |
| St Ives | 100% of St Ives | 18.1% of Camborne and Redruth |
| Truro and Newquay | 61.4% of Truro and Falmouth | 34.7% of St Austell and Newquay
6.3% of Camborne and Redruth
|
| New seat | Primary component | Secondary component(s) |
|---|---|---|
| Bideford, Bude and Launceston | 54.5% of Devon West and Torridge | 51.7% of Cornwall North |
| Devon Central | 91.0% of Devon Central | 13.0% of Devon West and Torridge |
| Devon East | 100% of Devon East | 2.2% of Devon Central |
| Devon North | Unchanged | |
| Devon South | 100% of Totnes | 8.2% of Devon South West |
| Exeter | Unchanged | |
| Newton Abbot | 100% of Newton Abbot | 6.8% of Devon Central |
| Plymouth Devonport | 71.4% of Plymouth Moor View | 39.8% of Plymouth Sutton and Devonport |
| Plymouth Sutton | 60.2% of Plymouth Sutton and Devonport | 27.8% of Devon South West
15.1% of Plymouth Moor View
|
| Tavistock and Plympton | 64.0% of Devon South West | 32.5% of Devon West and Torridge
13.5% of Plymouth Moor View
|
| Tiverton and Honiton | Unchanged | |
| Torbay | Unchanged |
| New seat | Primary component | Secondary component(s) |
|---|---|---|
| Bournemouth East | 100% of Bournemouth East | 10.1% of Bournemouth West |
| Bournemouth West and Bourne Valley | 89.9% of Bournemouth West | 12.7% of Dorset Mid and Poole North
7.6% of Poole
|
| Christchurch | 97.1% of Christchurch | 15.8% of Dorset North |
| Dorset Mid | 70.6% of Dorset Mid and Poole North | 43.9% of Dorset North
2.9% of Christchurch
|
| Dorset South | Unchanged | |
| Dorset West | Unchanged | |
| Poole | 92.4% of Poole | 16.8% of Dorset Mid and Poole North |
| New seat | Primary component | Secondary component(s) |
|---|---|---|
| Bridgwater and West Somerset | 83.5% of Bridgwater and West Somerset | 11.4% of Taunton Deane |
| Burnham and Glastonbury | 68.8% of Wells | 16.5% of Bridgwater and West Somerset
6.8% of Somerton and Frome
|
| Somerton and Frome | 84.1% of Somerton and Frome | 4.9% of Yeovil |
| Taunton | 88.6% of Taunton Deane | |
| Yeovil | 95.1% of Yeovil |