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.
The main changes are the addition of one new seat in Cornwall (St Austell and Newquay) which should be a Lib Dem seat, and another new seat in Devon (Devon Central) which should be Conservative. Also the Devon seat of Devon West and Torridge is predicted to be a narrow Lib Dem gain from the old Conservative seat of the same name.
| New seat | Primary component | Secondary component | ||
| Camborne and Redruth | 66.2% of Falmouth and Camborne | 14.1% of St Ives
3.4% of Truro and St Austell | ||
| Cornwall North | 72.6% of Cornwall North | 2.4% of Cornwall South East | ||
| Cornwall South East | 85.6% of Cornwall South East | |||
| St Austell and Newquay | 46.1% of Truro and St Austell | 27.4% of Cornwall North
12.0% of Cornwall South East | ||
| St Ives | 85.9% of St Ives | |||
| Truro and Falmouth | 50.4% of Truro and St Austell | 33.8% of Falmouth and Camborne |
| New seat | Primary component | Secondary component | ||
| Devon Central | 27.3% of Teignbridge | 22.2% of Tiverton and Honiton
17.1% of Devon West and Torridge 8.1% of Totnes 5.3% of Devon North | ||
| Devon East | 68.1% of Devon East | 17.2% of Tiverton and Honiton
9.2% of Exeter | ||
| Devon North | 94.7% of Devon North | |||
| Devon South West | 95.9% of Devon South West | |||
| Devon West and Torridge | 82.9% of Devon West and Torridge | 4.1% of Devon South West | ||
| Exeter | 90.8% of Exeter | |||
| Newton Abbot | 72.7% of Teignbridge | 4.1% of Totnes | ||
| Plymouth Moor View | 89.5% of Plymouth Devonport | 4.3% of Plymouth Sutton | ||
| Plymouth Sutton and Devonport | 95.7% of Plymouth Sutton | 10.5% of Plymouth Devonport | ||
| Tiverton and Honiton | 60.6% of Tiverton and Honiton | 31.9% of Devon East | ||
| Torbay | 94.4% of Torbay | 3.4% of Totnes | ||
| Totnes | 84.4% of Totnes | 5.6% of Torbay |
| New seat | Primary component | Secondary component | ||
| Bournemouth East | 94.2% of Bournemouth East | 17.5% of Bournemouth West | ||
| Bournemouth West | 82.5% of Bournemouth West | 11.0% of Dorset Mid and Poole North
7.2% of Poole 5.8% of Bournemouth East | ||
| Christchurch | 84.9% of Christchurch | 5.0% of Dorset North | ||
| Dorset Mid and Poole North | 78.4% of Dorset Mid and Poole North | 14.9% of Dorset North | ||
| Dorset North | 80.1% of Dorset North | 15.1% of Christchurch | ||
| Dorset South | Unchanged | |||
| Dorset West | Unchanged | |||
| Poole | 92.8% of Poole | 10.5% of Dorset Mid and Poole North |
| New seat | Primary component | Secondary component | ||
| Bridgwater and West Somerset | 100% of Bridgwater | 4.7% of Taunton | ||
| Somerton and Frome | 97.5% of Somerton and Frome | 1.0% of Yeovil | ||
| Taunton Deane | 95.3% of Taunton | |||
| Wells | Unchanged | |||
| Yeovil | 99.0% of Yeovil | 2.5% of Somerton and Frome |