Constituencies: L
33 constituencies
| Constituency | Nation | GSS code |
|---|---|---|
| Lagan Valley | Northern Ireland | N05000009 |
| Lancaster and Wyre | England | E14001318 |
| Leeds Central and Headingley | England | E14001319 |
| Leeds East | England | E14001320 |
| Leeds North East | England | E14001321 |
| Leeds North West | England | E14001322 |
| Leeds South | England | E14001323 |
| Leeds South West and Morley | England | E14001324 |
| Leeds West and Pudsey | England | E14001325 |
| Leicester East | England | E14001326 |
| Leicester South | England | E14001327 |
| Leicester West | England | E14001328 |
| Leigh and Atherton | England | E14001329 |
| Lewes | England | E14001330 |
| Lewisham East | England | E14001331 |
| Lewisham North | England | E14001332 |
| Lewisham West and East Dulwich | England | E14001333 |
| Leyton and Wanstead | England | E14001334 |
| Lichfield | England | E14001335 |
| Lincoln | England | E14001336 |
| Liverpool Garston | England | E14001337 |
| Liverpool Riverside | England | E14001338 |
| Liverpool Walton | England | E14001339 |
| Liverpool Wavertree | England | E14001340 |
| Liverpool West Derby | England | E14001341 |
| Livingston | Scotland | S14000095 |
| Llanelli | Wales | W07000098 |
| Lothian East | Scotland | S14000096 |
| Loughborough | England | E14001342 |
| Louth and Horncastle | England | E14001343 |
| Lowestoft | England | E14001344 |
| Luton North | England | E14001345 |
| Luton South and South Bedfordshire | England | E14001346 |