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 |
| Taunton Deane | 81,767 | 69.3% | 25,159 | 44.4% | 1,868 |
| Cambridge | 80,588 | 59.0% | 21,278 | 44.8% | 5,834 |
| Yeovil | 79,306 | 63.9% | 26,076 | 51.5% | 8,779 |
| Somerton and Frome | 77,035 | 69.3% | 23,341 | 43.8% | 595 |
| Cheltenham | 76,704 | 62.5% | 18,877 | 39.4% | 316 |
| Hornsey and Wood Green | 76,630 | 61.8% | 20,512 | 43.3% | 2,395 |
| Oxford West and Abingdon | 75,715 | 67.1% | 23,418 | 46.1% | 6,816 |
| Torbay | 75,272 | 60.2% | 18,943 | 41.8% | 2,727 |
| Eastleigh | 74,167 | 64.4% | 18,313 | 38.3% | 534 |
| Kingston and Surbiton | 74,102 | 67.7% | 25,637 | 51.1% | 9,084 |
| Bermondsey and Old Southwark | 73,944 | 48.8% | 17,177 | 47.6% | 5,769 |
| Harrogate and Knaresborough | 73,815 | 66.7% | 25,639 | 52.1% | 7,980 |
| Colchester | 72,405 | 56.5% | 19,517 | 47.7% | 6,388 |
| North Devon | 72,171 | 68.3% | 22,869 | 46.4% | 5,276 |
| Cheadle | 72,103 | 68.7% | 23,671 | 47.8% | 3,672 |
| Birmingham, Yardley | 71,986 | 54.5% | 16,485 | 42.0% | 2,864 |
| Chesterfield | 71,716 | 59.9% | 20,190 | 47.0% | 2,733 |
| York Outer | 71,464 | 64.4% | 16,904 | 36.7% | 203 |
| Twickenham | 71,444 | 72.3% | 26,696 | 51.6% | 9,965 |
| Winchester | 71,253 | 71.9% | 25,621 | 50.0% | 6,524 |
| St Austell and Newquay | 70,872 | 64.9% | 21,747 | 47.3% | 5,723 |
| Bristol West | 70,819 | 63.6% | 17,599 | 39.1% | 1,147 |
| Richmond Park | 69,566 | 73.2% | 23,771 | 46.7% | 3,613 |
| Chippenham | 69,443 | 66.9% | 19,704 | 42.4% | 2,183 |
| Manchester, Withington | 69,227 | 55.4% | 16,195 | 42.3% | 531 |
| Hereford and South Herefordshire | 69,022 | 66.1% | 19,793 | 43.4% | 1,089 |
| South East Cornwall | 68,856 | 67.7% | 21,795 | 46.8% | 5,485 |
| North Norfolk | 68,221 | 72.7% | 26,410 | 53.2% | 8,575 |
| Southport | 67,530 | 61.0% | 19,093 | 46.3% | 3,838 |
| Sheffield, Hallam | 67,522 | 67.9% | 21,253 | 46.4% | 7,416 |
| Westmorland and Lonsdale | 67,131 | 70.8% | 21,829 | 46.0% | 806 |
| Lewes | 66,979 | 69.8% | 24,071 | 51.5% | 7,889 |
| Newton Abbot | 66,766 | 68.9% | 20,967 | 45.6% | 4,830 |
| Romsey and Southampton North | 66,353 | 66.4% | 19,217 | 43.6% | 204 |
| Leeds North West | 66,231 | 62.8% | 15,328 | 36.9% | 2,064 |
| Truro and Falmouth | 65,288 | 65.1% | 17,406 | 41.0% | 3,931 |
| North Cornwall | 65,257 | 64.5% | 17,812 | 42.3% | 2,892 |
| Carshalton and Wallington | 64,989 | 64.3% | 16,870 | 40.4% | 1,225 |
| St Ives | 64,459 | 67.8% | 22,651 | 51.8% | 10,711 |
| Portsmouth South | 64,306 | 57.4% | 15,370 | 41.6% | 2,955 |
| Sutton and Cheam | 64,281 | 67.2% | 20,255 | 46.9% | 2,689 |
| Thornbury and Yate | 64,045 | 73.6% | 25,622 | 54.3% | 11,060 |
| Hazel Grove | 62,991 | 61.3% | 19,423 | 50.3% | 7,694 |
| Mid Dorset and North Poole | 62,730 | 72.1% | 22,596 | 50.0% | 5,931 |
| Cardiff Central | 61,079 | 59.2% | 17,991 | 49.8% | 5,593 |
| Camborne and Redruth | 61,035 | 63.2% | 13,830 | 35.9% | 2,733 |
| Bath | 60,023 | 69.1% | 18,845 | 45.4% | 5,624 |
| Berwick-upon-Tweed | 57,519 | 63.3% | 19,147 | 52.6% | 8,585 |
| Brecon and Radnorshire | 55,171 | 69.5% | 17,182 | 44.8% | 3,905 |
| Ceredigion | 52,514 | 68.0% | 13,045 | 36.5% | 218 |
| Montgomeryshire | 46,655 | 66.3% | 15,548 | 50.3% | 7,048 |
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.