| L For Lester | — | — | — | — |
| L.A. 7 | BBC Children's and Education, BBC One | — | 1 | 13 |
| La Rebelle : Les Aventures de la jeune George Sand | — | — | — | — |
| Lab Rats | BBC Two | sitcom | 1 | 6 |
| Ladette to Lady | — | reality television | 5 | 27 |
| Ladhood | — | — | — | — |
| Ladies in Charge | — | — | — | — |
| Ladies of Letters | — | — | — | — |
| Lads' Army | ITV | reality television | 4 | 32 |
| Lady Killers | — | — | — | — |
| Lame Ducks | BBC Two | sitcom | 2 | 12 |
| Land Girls | BBC One | drama film | 3 | 15 |
| Land of Hope and Gloria | — | — | — | — |
| Land of Hope and Glory | British Broadcasting Corporation | — | — | 3 |
| Land of the Tiger | BBC Two | nature documentary | 1 | 6 |
| Landmark Sitcom Season | — | — | — | — |
| Landscapes of England | BBC Two | — | — | 12 |
| Landward | — | — | — | — |
| Lark Rise to Candleford | BBC One | drama television series | 4 | 40 |
| Last Chance Lottery | — | game show | — | — |
| Last Chance to See | BBC Two | — | 1 | 6 |
| Last Choir Standing | BBC One | reality television | 1 | 16 |
| Last Man Standing | BBC Three | reality television | 3 | 22 |
| Last of the Summer Wine | BBC One | sitcom | 31 | 295 |
| Last Tango in Halifax | BBC One | comedy drama, LGBT-related television series | 5 | 24 |
| Last Voices of World War 1 | — | documentary television program | — | — |
| Late Kick Off | BBC One | — | 5 | 64 |
| Late Night Horror | — | horror television series | — | 6 |
| Late Night Line-Up | — | — | — | — |
| Late Night Lycett | Channel 4 | talk show | — | — |
| Late Night Theatre | — | — | — | — |
| Late Starter | — | — | — | 8 |
| Later... with Jools Holland | BBC Two | music television | 51 | 295 |
| Laugh??? I Nearly Paid My Licence Fee | — | — | — | — |
| Law & Order: UK | ITV | police procedural, drama television series, legal drama | 8 | 53 |
| Lawless | — | thriller television series | — | 2 |
| Lazarus | Amazon Prime Video | thriller | — | — |
| Lazarus and Dingwall | — | — | — | — |
| Lead Balloon | BBC Four | sitcom | 4 | 27 |
| Leap in the Dark | — | anthology series | — | — |
| Learn With Sooty | — | — | — | — |
| Leave It to Todhunter | — | — | — | — |
| Leave Us Kids Alone | — | reality television | — | — |
| Leaving | — | — | — | — |
| Lee and Dean | — | — | — | — |
| Lee Mack's All Star Cast | BBC One | comedy television series | 1 | 6 |
| Lee Nelson's Well Funny People | BBC Three | comedy television series | 1 | 7 |
| Lee Nelson's Well Good Show | BBC Three | comedy television series | 2 | 15 |
| Lefties | — | documentary film | — | — |
| Legends | Netflix | crime thriller film | — | — |
| Legends of the Deep: Deep Sea Sharks | — | — | — | — |
| Lego Masters | Channel 4 | reality television | — | — |
| Lemon la Vida Loca | ITV2 | — | 2 | 12 |
| Lemur Street | Animal Planet | documentary television program | 1 | 20 |
| Len and the River Mob | — | — | — | — |
| Lena | British Broadcasting Corporation | variety show | 3 | 18 |
| Lena and Bonnie | — | — | — | — |
| Lena Zavaroni and Music | — | — | 1 | 6 |
| Lenny Blue | — | — | 2 | 4 |
| Lenny Henry in Pieces | British Broadcasting Corporation | comedy television series | 2 | 15 |
| Leonardo | Rai 1 | historical play, period drama film | 1 | 8 |
| Leonardo | BBC Children's and Education | drama television series | 2 | 26 |
| Les Dennis's Home Video Heroes | — | — | 2 | 60 |
| Let It Shine | BBC One | reality television | 1 | 3 |
| Let Me Entertain You | — | — | 1 | 6 |
| Let Me Entertain You | BBC Two | variety show | 2 | 40 |
| Let Them Eat Cake | BBC One | sitcom | 1 | 6 |
| Let There Be Love | — | sitcom | 2 | 12 |
| Let's Do Lunch with Gino & Mel | — | cooking show | 4 | 88 |
| Let's Get Gold | — | — | 1 | 3 |
| Let's Play | CBeebies | — | — | — |
| Let's Roll with Roland Butter | ITV | — | 1 | — |
| Let's Sing and Dance | — | talent show | — | — |
| Let's talk about Sex | Channel 4 | documentary film | 1 | 3 |
| Level Up | British Broadcasting Corporation | — | — | — |
| 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 Drawing Live! | — | — | — | — |
| 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 in the Snow | — | — | — | 1 |
| 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 Marbs | — | — | 1 | 12 |
| 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 |
| Life: An Idiot's Guide | BBC Radio 4 | comedy | 3 | 4 |
| 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 |
| Listening Post | Al Jazeera English | media journalism | — | — |
| 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 | — | — | — | — |
| Little Miss Jocelyn | BBC Three, BBC Two | comedy television series | 2 | 13 |
| Little Mix: The Search | BBC One | reality television | 1 | 4 |
| Little Sir Nicholas | British Broadcasting Corporation | — | — | 6 |
| Little Women | — | romance television series, drama television series | — | — |
| Little Women | BBC One | drama television series, coming-of-age television program, romance television series | 1 | 3 |
| Little Women | British Broadcasting Corporation | — | 1 | 9 |
| Live & Dangerous | — | — | — | 12 |
| Live & Kicking | BBC One | — | 8 | 264 |
| Live at Five | — | — | — | — |
| Live at the Apollo | BBC Two | comedy television series | 12 | 69 |
| Live at the Electric | — | comedy television series | — | — |
| Live Floor Show | — | comedy television series | 3 | — |
| Live from Abbey Road | Channel 4 | — | — | 48 |
| Live from Her Majesty's | ITV | — | 7 | 43 |
| Live from the BBC | — | — | — | 12 |
| Live Roulette | Super Casino | — | — | — |
| Live TV Bingo | Sky UK | — | — | — |
| Live With Chris Moyles | — | — | 1 | 65 |
| Live!Girls! present Dogtown | BBC Three | sitcom | 1 | 6 |
| Liverpool 1 | — | — | 2 | 12 |
| Living and Growing | — | — | — | — |
| Living Britain | BBC Two | nature documentary | 1 | 6 |
| Living in the Past | — | documentary film, reality television | — | 12 |
| Living It Up | ITV | sitcom | 2 | 9 |
| Living on the Edge | MTV | reality television | 2 | 18 |
| Living on the Veg | — | — | — | — |
| Living the Life | — | — | 3 | 27 |
| Living with Modernism | — | documentary film | — | — |
| Living with the Dead | — | — | — | — |
| Living with the Future | — | documentary film | — | — |
| Liza & Huey's Pet Nation | — | — | 1 | 11 |
| Lizzie Dripping | BBC One | — | — | 9 |
| Loaded | Channel 4 | — | 1 | 8 |
| Loaded Fight Night | — | — | — | — |
| Local Food Hero | — | cooking show | 3 | — |
| Local Heroes | — | documentary film | — | — |
| Location, Location, Location | Channel 4 | reality television | — | — |
| Lockerbie: A Search for Truth | Sky Atlantic, Peacock | biographical film | — | 5 |
| Lockwood & Co | Netflix | paranormal television program, detective television series, action television series, fantasy television series, horror television series, thriller television series, teen television series, mystery television series | 1 | 8 |
| LOL: Last One Laughing UK | Amazon Prime Video | game show | 1 | 6 |
| London | British Broadcasting Corporation | documentary film | 1 | 3 |
| London Bridge | ITV | soap opera | 4 | 237 |
| London Ink | Real Time | reality television | 2 | 12 |
| London Irish | Channel 4 | sitcom | 1 | 6 |
| London Kills | — | — | 4 | 20 |
| London Live | Rai 2 | — | — | — |
| London Playhouse | — | — | — | — |
| London Spy | BBC Two | drama television series | 1 | 5 |
| London's Burning | ITV | drama television series | 14 | 171 |
| London's Burning | — | — | — | — |
| Long Lost Family | ITV1 | documentary television program | — | 49 |
| Long Shadow | BBC Two | documentary television program | — | — |
| Long Way Down | BBC Two | travel documentary | — | 6 |
| Long Way Home | Apple TV | travel documentary | — | 10 |
| Long Way Round | Sky One | travel documentary | 1 | 7 |
| Long Way Up | Apple TV | travel documentary | — | 11 |
| Longitude | Channel 4 | drama television series | — | 4 |
| Look and Read | BBC One | children's television series | — | — |
| Look Around You | BBC Two | comedy television series | 2 | 15 |
| Lookaround | — | — | — | — |
| Looking After Jo Jo | — | — | 1 | 4 |
| Looking For Clancy | — | — | — | 5 |
| Loose Lips | — | — | 1 | 44 |
| Loose Talk | — | — | — | — |
| Loose Women | ITV | talk show | 24 | — |
| Lord of the Flies | BBC iPlayer, BBC One | adventure fiction, drama fiction, thriller | — | 4 |
| Lord Peter Wimsey | British Broadcasting Corporation | — | — | — |
| Lord Raingo | — | — | — | — |
| Lorna Doone | — | — | — | — |
| Lorraine | ITV | LGBT-related television series, breakfast television | — | — |
| Los Dos Bros | Channel 4 | sitcom | 1 | 6 |
| Lose A Million | ITV | game show | 1 | — |
| Lost Animals of the 20th Century | Channel 4 | — | 1 | 68 |
| Lost Boys & Fairies | BBC One | drama film, LGBT-related television series | — | 3 |
| Lost Empires | — | drama television series | — | — |
| Lost in Austen | ITV | romance television series | 1 | 4 |
| Lost Kingdoms of Africa | BBC Four | documentary film | 2 | 8 |
| Lost Land of the Jaguar | BBC One | nature documentary | — | 3 |
| Lost Land of the Tiger | BBC One | nature documentary | — | 3 |
| Lost Land of the Volcano | — | documentary film | 1 | 3 |
| Lost Treasures of Egypt | National Geographic | documentary film | 6 | 48 |
| Lost Worlds, Vanished Lives | BBC Two | nature documentary | 1 | 4 |
| Louie Spence's Showbusiness | — | — | 1 | 10 |
| Louis Theroux Interviews | — | documentary television program | — | — |
| Louis Theroux's BBC Two specials | — | documentary film | — | — |
| Louis Theroux's Forbidden America | — | documentary film | — | 3 |
| Louis Theroux's Weird Weekends | BBC Two | documentary television program | 3 | 17 |
| Louis Theroux: Altered States | — | documentary television program | — | — |
| Love and Marriage | — | comedy drama | — | — |
| Love at First Sight | Sky One | — | — | — |
| Love for Lydia | ITV | — | — | 13 |
| Love Hurts | BBC One | drama television series, comedy television series | 3 | 30 |
| Love in a Cold Climate | — | — | — | 8 |
| Love Island | ITV | reality television | 2 | 5 |
| Love Island | Neox TV | — | — | — |
| Love Life | — | drama television series | — | — |
| Love Me, Love Me Not | — | — | — | — |
| Love Monster | CBeebies | — | — | — |
| Love on a Saturday Night | ITV | — | 2 | 10 |
| Love Rat | Channel 5 | drama television series | — | — |
| Love Shaft | — | reality television | — | — |
| Love Soup | BBC One | comedy drama, romance television series | 2 | 18 |
| Love Story | — | — | — | — |
| Love Thy Neighbour | ITV | sitcom | 7 | 54 |
| Love Thy Neighbour | — | reality television | — | — |
| Love Your Garden | ITV | — | 6 | 35 |
| Love, Lies and Records | BBC One | LGBT-related television series | 1 | — |
| Lovejoy | BBC One | drama television series, comedy drama, mystery television series | 6 | 71 |
| Loveland | — | game show | — | — |
| Lovely Little Farm | — | — | — | — |
| Lovesick | Channel 4 | romantic comedy | 3 | 22 |
| LRTV | — | — | — | — |
| Lucky Feller | — | sitcom | 1 | 13 |
| Lucky Ladders | ITV | game show | 6 | 185 |
| Lucky Numbers | ITV | game show | 3 | 50 |
| Lucy Sullivan Is Getting Married | ITV | — | — | 16 |
| Ludwig | BBC One | — | 2 | 12 |
| Luna | ITV | science fiction television series, comedy television series, children's television series | 2 | 12 |
| Lunch Monkeys | BBC Three | sitcom | 2 | 12 |
| Lunchtime with Wogan | — | — | — | — |
| Luther | BBC One | police procedural, drama television series | 5 | 20 |
| Luv | BBC One | sitcom | 2 | 18 |
| LWT News | — | — | — | — |
| Lynley | BBC One, BBC NL, Eesti Televisioon, Das Erste | drama television series, crime television series, mystery television series | — | — |
| Lytton's Diary | — | — | 2 | 12 |