Below are lists of SDP-Liberal Alliance marginal seats showing which constituencies won in the latest elections can be most easily lost.
Historical
Below is the SDP-Liberal Alliance defence list consisting of SDP-Liberal Alliance held marginal seats for the 1992 general election based on the 1987 boundaries. These marginal constituencies are ordered from the most vulnerable seats to the safest.
| Rank | Constituency | Region | Majority | Swing to Defeat | |
|---|---|---|---|---|---|
| 1. | Brecon and Radnor | Wales | 56 | 0.07% | |
| 2. | Southport | North West | 1,849 | 1.70% | |
| 3. | Fife North East | Scotland | 1,447 | 1.82% | |
| 4. | Argyll and Bute | Scotland | 1,394 | 1.89% | |
| 5. | Woolwich | London | 1,937 | 2.36% | |
| 6. | Liverpool Mossley Hill | North West | 2,226 | 2.43% | |
| 7. | Rochdale | North West | 2,779 | 2.71% | |
| 8. | Greenwich | London | 2,141 | 2.87% | |
| 9. | Southwark and Bermondsey | London | 2,779 | 3.86% | |
| 10. | Montgomery | Wales | 2,558 | 4.05% | |
| 11. | Truro | South West | 4,753 | 4.11% | |
| 12. | Ceredigion and Pembroke North | Wales | 4,700 | 4.87% | |
| 13. | Yeovil | South West | 5,700 | 5.08% | |
| 14. | Inverness, Nairn and Lochaber | Scotland | 5,431 | 5.74% | |
| 15. | Roxburgh and Berwickshire | Scotland | 4,008 | 6.02% | |
| 16. | Plymouth Devonport | South West | 6,470 | 6.50% | |
| 17. | Gordon | Scotland | 9,519 | 8.79% | |
| 18. | Orkney and Shetland | Scotland | 3,922 | 9.20% | |
| 19. | Tweeddale, Ettrick and Lauderdale | Scotland | 5,942 | 10.16% | |
| 20. | Berwick-upon-Tweed | North East | 9,503 | 11.30% | |
| 21. | Ross, Cromarty and Skye | Scotland | 11,319 | 14.86% | |
| 22. | Caithness and Sutherland | Scotland | 8,494 | 18.46% |