Notional results for a UK general election on 5 May 2005 Elections won by Liberal Democrat
A notional general election to the 54th Parliament of the United Kingdom with an electorate of 40,611,844, having 24,814,623 valid votes.
| Constituency | Electorate | Turnout | Votes | Vote share | Majority |
| York Outer | 71,464 | 64.4% | 16,904 | 36.7% | 203 |
| Yeovil | 79,306 | 63.9% | 26,076 | 51.5% | 8,779 |
| Winchester | 71,253 | 71.9% | 25,621 | 50.0% | 6,524 |
| Westmorland and Lonsdale | 67,131 | 70.8% | 21,829 | 46.0% | 806 |
| Twickenham | 71,444 | 72.3% | 26,696 | 51.6% | 9,965 |
| Truro and Falmouth | 65,288 | 65.1% | 17,406 | 41.0% | 3,931 |
| Torbay | 75,272 | 60.2% | 18,943 | 41.8% | 2,727 |
| Thornbury and Yate | 64,045 | 73.6% | 25,622 | 54.3% | 11,060 |
| Taunton Deane | 81,767 | 69.3% | 25,159 | 44.4% | 1,868 |
| Sutton and Cheam | 64,281 | 67.2% | 20,255 | 46.9% | 2,689 |
| St Ives | 64,459 | 67.8% | 22,651 | 51.8% | 10,711 |
| St Austell and Newquay | 70,872 | 64.9% | 21,747 | 47.3% | 5,723 |
| Southport | 67,530 | 61.0% | 19,093 | 46.3% | 3,838 |
| South East Cornwall | 68,856 | 67.7% | 21,795 | 46.8% | 5,485 |
| Somerton and Frome | 77,035 | 69.3% | 23,341 | 43.8% | 595 |
| Sheffield, Hallam | 67,522 | 67.9% | 21,253 | 46.4% | 7,416 |
| Romsey and Southampton North | 66,353 | 66.4% | 19,217 | 43.6% | 204 |
| Richmond Park | 69,566 | 73.2% | 23,771 | 46.7% | 3,613 |
| Portsmouth South | 64,306 | 57.4% | 15,370 | 41.6% | 2,955 |
| Oxford West and Abingdon | 75,715 | 67.1% | 23,418 | 46.1% | 6,816 |
| North Norfolk | 68,221 | 72.7% | 26,410 | 53.2% | 8,575 |
| North Devon | 72,171 | 68.3% | 22,869 | 46.4% | 5,276 |
| North Cornwall | 65,257 | 64.5% | 17,812 | 42.3% | 2,892 |
| Newton Abbot | 66,766 | 68.9% | 20,967 | 45.6% | 4,830 |
| Montgomeryshire | 46,655 | 66.3% | 15,548 | 50.3% | 7,048 |
| Mid Dorset and North Poole | 62,730 | 72.1% | 22,596 | 50.0% | 5,931 |
| Manchester, Withington | 69,227 | 55.4% | 16,195 | 42.3% | 531 |
| Lewes | 66,979 | 69.8% | 24,071 | 51.5% | 7,889 |
| Leeds North West | 66,231 | 62.8% | 15,328 | 36.9% | 2,064 |
| Kingston and Surbiton | 74,102 | 67.7% | 25,637 | 51.1% | 9,084 |
| Hornsey and Wood Green | 76,630 | 61.8% | 20,512 | 43.3% | 2,395 |
| Hereford and South Herefordshire | 69,022 | 66.1% | 19,793 | 43.4% | 1,089 |
| Hazel Grove | 62,991 | 61.3% | 19,423 | 50.3% | 7,694 |
| Harrogate and Knaresborough | 73,815 | 66.7% | 25,639 | 52.1% | 7,980 |
| Eastleigh | 74,167 | 64.4% | 18,313 | 38.3% | 534 |
| Colchester | 72,405 | 56.5% | 19,517 | 47.7% | 6,388 |
| Chippenham | 69,443 | 66.9% | 19,704 | 42.4% | 2,183 |
| Chesterfield | 71,716 | 59.9% | 20,190 | 47.0% | 2,733 |
| Cheltenham | 76,704 | 62.5% | 18,877 | 39.4% | 316 |
| Cheadle | 72,103 | 68.7% | 23,671 | 47.8% | 3,672 |
| Ceredigion | 52,514 | 68.0% | 13,045 | 36.5% | 218 |
| Carshalton and Wallington | 64,989 | 64.3% | 16,870 | 40.4% | 1,225 |
| Cardiff Central | 61,079 | 59.2% | 17,991 | 49.8% | 5,593 |
| Cambridge | 80,588 | 59.0% | 21,278 | 44.8% | 5,834 |
| Camborne and Redruth | 61,035 | 63.2% | 13,830 | 35.9% | 2,733 |
| Bristol West | 70,819 | 63.6% | 17,599 | 39.1% | 1,147 |
| Brecon and Radnorshire | 55,171 | 69.5% | 17,182 | 44.8% | 3,905 |
| Birmingham, Yardley | 71,986 | 54.5% | 16,485 | 42.0% | 2,864 |
| Berwick-upon-Tweed | 57,519 | 63.3% | 19,147 | 52.6% | 8,585 |
| Bermondsey and Old Southwark | 73,944 | 48.8% | 17,177 | 47.6% | 5,769 |
| Bath | 60,023 | 69.1% | 18,845 | 45.4% | 5,624 |
Turnout as calculated by the House of Commons Library, is the total number of votes cast and not spoiled, divided by the size of the electorate.
Estimates of the 2005 general election result in new constituencies
Professors Colin Rallings and Michael Thrasher, at The Elections Centre of the University of Exeter, produced estimates of the 2005 general election result as if the new constituencies recommended by the separate Parliamentary Boundary Commissions for England, Wales and Northern Ireland had then been in existence.