Notional results for a UK general election on 5 May 2005 East Midlands, England - by majority
| Constituency | Winning party | Valid votes | Majority (votes) | Majority (%) |
| Bolsover | Lab | 40,395 | 19,260 | 47.7% |
| Nottingham North | Lab | 31,356 | 12,870 | 41.0% |
| Leicester East | Lab | 42,175 | 16,400 | 38.9% |
| South Holland and The Deepings | Con | 46,580 | 15,127 | 32.5% |
| Mansfield | Lab | 43,882 | 13,776 | 31.4% |
| Derby South | Lab | 40,201 | 11,655 | 29.0% |
| Leicester West | Lab | 32,320 | 8,539 | 26.4% |
| Rutland and Melton | Con | 49,436 | 12,998 | 26.3% |
| Daventry | Con | 46,818 | 11,776 | 25.2% |
| Ashfield | Lab | 42,711 | 10,370 | 24.3% |
| Nottingham East | Lab | 29,240 | 7,083 | 24.2% |
| Sleaford and North Hykeham | Con | 52,544 | 12,687 | 24.1% |
| South Northamptonshire | Con | 49,693 | 11,356 | 22.9% |
| North East Derbyshire | Lab | 42,863 | 9,564 | 22.3% |
| Newark | Con | 45,444 | 10,077 | 22.2% |
| Louth and Horncastle | Con | 46,548 | 9,813 | 21.1% |
| Derbyshire Dales | Con | 42,325 | 8,810 | 20.8% |
| Rushcliffe | Con | 48,222 | 9,932 | 20.6% |
| Nottingham South | Lab | 34,718 | 6,665 | 19.2% |
| Charnwood | Con | 47,727 | 8,613 | 18.0% |
| Bassetlaw | Lab | 46,077 | 8,256 | 17.9% |
| Gainsborough | Con | 44,534 | 7,895 | 17.7% |
| Sherwood | Lab | 43,192 | 6,869 | 15.9% |
| South Leicestershire | Con | 48,848 | 7,704 | 15.8% |
| Grantham and Stamford | Con | 46,344 | 7,308 | 15.8% |
| Erewash | Lab | 43,309 | 6,782 | 15.7% |
| Boston and Skegness | Con | 43,151 | 6,391 | 14.8% |
| Derby North | Lab | 39,032 | 5,691 | 14.6% |
| Mid Derbyshire | Con | 42,503 | 5,329 | 12.5% |
| Amber Valley | Lab | 43,973 | 5,512 | 12.5% |
| Bosworth | Con | 49,768 | 5,335 | 10.7% |
| Gedling | Lab | 44,994 | 4,335 | 9.6% |
| North West Leicestershire | Lab | 47,140 | 4,477 | 9.5% |
| Lincoln | Lab | 40,182 | 3,806 | 9.5% |
| Northampton North | Lab | 37,116 | 3,340 | 9.0% |
| Leicester South | Lab | 42,446 | 3,727 | 8.8% |
| Harborough | Con | 48,310 | 4,047 | 8.4% |
| Chesterfield | LD | 42,992 | 2,733 | 6.4% |
| South Derbyshire | Lab | 44,663 | 2,436 | 5.5% |
| Broxtowe | Lab | 48,146 | 2,139 | 4.4% |
| Loughborough | Lab | 46,760 | 1,816 | 3.9% |
| High Peak | Lab | 46,085 | 1,750 | 3.8% |
| Northampton South | Lab | 38,262 | 1,445 | 3.8% |
| Corby | Lab | 48,527 | 1,517 | 3.1% |
| Wellingborough | Con | 48,855 | 610 | 1.2% |
| Kettering | Con | 44,875 | 176 | 0.4% |
Estimates of the 2005 general election result in new constituencies
Colin Rallings and Michael Thrasher, then at the University of Plymouth, 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.
The Elections Centre, established by Professors Colin Rallings and Michael Thrasher, moved to the University of Exeter in 2003.