| Lewis | ITV1 | crime television series, drama television series | 9 | 33 |
| Liaison | Apple TV | espionage television series, thriller | 1 | 6 |
| Liam's Story | CBBC | — | 1 | 10 |
| Liar | ITV | drama | 2 | 12 |
| Lie With Me | — | — | 1 | 2 |
| Life | BBC One | nature documentary | 1 | 10 |
| Life | BBC One | — | 1 | 6 |
| Life After Life | BBC Two | period drama film, science fiction | 1 | 4 |
| Life and Death Row | — | documentary television series | — | — |
| Life As I Know it | — | drama television series | — | — |
| Life Begins | ITV1 | drama television series | 3 | 19 |
| Life Begins at Forty | ITV | sitcom | 2 | 14 |
| Life Bites | Disney Channel | comedy television series | 2 | 28 |
| Life Force | — | — | — | — |
| Life in Cold Blood | British Broadcasting Corporation | nature documentary | 1 | 5 |
| Life in Colour with David Attenborough | BBC One, Nine Network | — | 1 | 3 |
| Life in Squares | — | LGBT-related television series | 1 | 3 |
| Life in the Air | BBC One | — | — | 3 |
| Life in the Freezer | BBC One | nature documentary | — | 6 |
| Life Is Toff | BBC Three | reality television | 1 | 6 |
| Life of Crime | ITV1 | crime television series, drama television series | 1 | 3 |
| Life of Riley | BBC One | sitcom | 3 | 20 |
| Life on Earth | BBC Two | nature documentary | — | 13 |
| Life on Mars | BBC One, BBC Four | police television drama, science fiction television series, drama television series, comedy drama | 2 | 16 |
| Life Story | BBC One | nature documentary | 1 | 6 |
| Life Support | — | — | — | 6 |
| Life with The Lyons | BBC Television | sitcom | 5 | 40 |
| Life Without George | BBC One | sitcom | 3 | 20 |
| Life's Too Short | BBC Two, HBO | sitcom, mockumentary | 1 | 8 |
| Lifesense | BBC One | nature documentary | 1 | 6 |
| Lift Off with Ayshea | ITV | children's television series | 8 | 144 |
| Light Fantastic | BBC Four | documentary film | 1 | 4 |
| Light Lunch | Channel 4 | talk show | 4 | 150 |
| Lightfields | — | drama television series | — | 5 |
| Lillie | ITV | — | 1 | 13 |
| Lily Live! | ITV | — | 2 | 12 |
| Limitless Win | ITV | game show | — | — |
| Limmy's Other Stuff | BBC Scotland | sketch show | — | — |
| Limmy's Show | BBC Two Scotland | comedy television series | 3 | 20 |
| Linda Green | BBC One | drama fiction | 2 | 20 |
| Line of Duty | BBC Two | drama television series, police procedural | 6 | 36 |
| Lingo | ITV | game show | 5 | 180 |
| Lion | National Geographic Channel | documentary series, nature documentary | — | 4 |
| Lip Service | BBC Three | drama television series, LGBT-related television series | 2 | 12 |
| Lip Sync Battle UK | Channel 5 | — | 2 | 15 |
| Lipstick on Your Collar | Channel 4 | romantic comedy television series, drama television series, musical | 1 | 6 |
| Liquid News | BBC Choice | — | 4 | 292 |
| Little Angels | — | documentary film, reality television | 5 | 2 |
| Little Armadillos | — | sitcom | — | — |
| Little Big Shots | — | — | — | 6 |
| Little Birds | Sky Atlantic | drama fiction | 1 | 6 |
| Little Boy Blue | ITV | drama fiction | 1 | 4 |
| Little Britain | BBC Three | satire, comedy television series | 4 | 36 |
| Little Charley Bear | CBeebies | — | 2 | 52 |
| Little Crackers | — | — | 3 | 35 |
| Little Disasters | Paramount+ | — | — | — |
| Little Dorrit | BBC One | drama television series | 1 | 14 |
| Little England | — | documentary television program | 2 | 20 |
| Little Ghosts | British Broadcasting Corporation, ZDF, TV Center | adventure television series, comedy television series | 2 | 38 |
| Little Grey Rabbit | — | — | — | — |