| Made in Chelsea: South of France | E4 | reality television | 1 | 6 |
| Madson | — | — | — | 6 |
| Maelstrom | BBC One | thriller television series, mystery television series, drama television series | — | 6 |
| Mafia's Greatest Hits | — | crime film | 1 | 13 |
| Maggie | — | — | — | — |
| Maggie and Her | ITV | sitcom | 2 | 14 |
| Magic Adventures of Mumfie | ITV | fantasy television program, children's television series | 3 | 79 |
| Magic Grandad | BBC Two | — | 6 | 21 |
| Magic Numbers | — | game show | 1 | 7 |
| Magpie | ITV | — | — | — |
| Magpie Murders | BBC One | — | 1 | 6 |
| Maid Marian and her Merry Men | BBC One | sitcom | 4 | 26 |
| Maigret | ITV | detective fiction, drama fiction | 2 | 4 |
| Maigret | British Broadcasting Corporation | drama television series, crime television series | 4 | 52 |
| Maigret | ITV | crime film | 2 | 12 |
| Maigret on Masterpiece | — | — | — | — |
| Maisie Raine | BBC One | detective fiction | 2 | 12 |
| Make Me a Supermodel | Channel 5 | reality television | 2 | 21 |
| Make Me an Egghead | BBC Two | — | 1 | 25 |
| Make Me Prime Minister | — | — | — | — |
| Make That Movie | Channel 4 | comedy film | 1 | 6 |
| Make Your Play | ITV1 | — | — | — |
| Making News | — | — | 1 | 6 |
| Making Out | BBC One | comedy drama | 3 | 24 |
| Making the Most of the Micro | BBC Two | — | — | 10 |
| Making Waves | ITV | drama television series | 1 | 6 |
| Making Your Mind Up | BBC One | — | — | — |
| Malcolm Vaughan | — | documentary film | 1 | 4 |
| Malice | — | — | — | — |
| Malice Aforethought | British Broadcasting Corporation | — | — | 4 |
| Malory Towers | CBBC | historical television series, drama television series | 5 | 64 |
| Malpractice | ITV | medical drama | 1 | 5 |
| Mamma Mia! I Have a Dream | — | — | — | 8 |
| Mammals | Amazon Prime Video | — | — | — |
| Mammoth | — | — | — | — |
| Man About the House | ITV | sitcom | 6 | 39 |
| Man Alive | BBC Two | documentary film | — | — |
| Man at the Top | ITV | — | — | — |
| Man Down | Channel 4 | sitcom | 4 | 26 |
| Man Like Mobeen | BBC Three | sitcom | 5 | 23 |
| Man O Man | ITV | game show | 2 | 23 |
| Man of the World | ITV | drama television series | 2 | 20 |
| Man Stroke Woman | BBC Three | comedy television series | 2 | 12 |
| Man to Man with Dean Learner | Channel 4 | talk show | — | 6 |
| Man v. Monster | Nat Geo Wild | — | 3 | 16 |
| Man vs. Baby | Netflix | comedy television series | 1 | 4 |
| Man vs. Bee | Netflix | comedy film | 1 | 9 |
| Man vs. Wild | Discovery Channel | reality television, nature program | 7 | 72 |
| Man's Work | — | — | — | — |
| Manchild | BBC Two | comedy television series | 2 | 15 |
| Mandela: The Struggle Is My Life | — | — | — | — |
| Manhunt | ITV | drama television series | 2 | 7 |
| Manhunt | ITV | — | 2 | 26 |
| Manhunt – Solving Britain's Crimes | — | — | — | — |
| Manhunt: Kill or Capture | — | crime film | 1 | 10 |
| Mann's Best Friends | — | — | — | — |
| Mansfield Park | BBC Two | drama television series | 1 | 6 |
| Map Man | — | documentary film | — | — |
| Mapp and Lucia | BBC One | — | 1 | 3 |
| Mapp and Lucia | Channel 4 | — | 2 | 10 |