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