From Morfa, Gwynedd to all cities in Greater London starting with letter L
- Ladywell, Gwynedd
- Lambeth, Gwynedd
- Lamorbey, Gwynedd
- Lampton, Gwynedd
- Langbourn, Gwynedd
- Lea Bridge, Gwynedd
- Leamouth, Gwynedd
- Leaves Green, Gwynedd
- Lee, Gwynedd
- Lesnes Abbey, Gwynedd
- Lessness Heath, Gwynedd
- Lewisham, Gwynedd
- Leyton, Gwynedd
- Leyton Marshes, Gwynedd
- Leytonstone, Gwynedd
- Lime Street, Gwynedd
- Limehouse, Gwynedd
- Lisson Grove, Gwynedd
- Little Britain, Gwynedd
- Little Heath, Gwynedd
- Little Ilford, Gwynedd
- Little Stanmore, Gwynedd
- Little Woodcote, Gwynedd
- Locksbottom, Gwynedd
- London, Gwynedd
- Longford, Gwynedd
- Longlands, Gwynedd
- Lower Clapton, Gwynedd
- Lower Edmonton, Gwynedd
- Lower Feltham, Gwynedd
- Lower Holloway, Gwynedd
- Lower Morden, Gwynedd
- Lower Place, Gwynedd
- Lower Sydenham, Gwynedd
- Loxford, Gwynedd
- Luxted, Gwynedd