| Mayo | BBC One | detective fiction | 1 | 8 |
| McCallum | ITV | crime film | 2 | 9 |
| McCready and Daughter | BBC One | — | 1 | 6 |
| McDonald & Dodds | ITV | crime television series | 4 | 11 |
| McMafia | BBC One, AMC | crime film | 1 | 8 |
| Me and My Girl | ITV, London Weekend Television | sitcom | 6 | 52 |
| Me Too! | BBC Two | — | 2 | 52 |
| Me, You and Him | ITV | sitcom | 1 | 6 |
| Mechannibals | — | — | — | — |
| Medici: Masters of Florence | Rai 1 | historical drama | 3 | 24 |
| Meees | — | children's television series | — | — |
| Meerkat Manor | Animal Planet | documentary television program | 4 | 53 |
| Meet Peters & Lee | — | — | — | — |
| Meet Ricky Gervais | Channel 4 | talk show | 1 | 6 |
| Meet the Adebanjos | — | — | 3 | 50 |
| Meet the Ancestors | — | documentary film | — | — |
| Meet the Drug Lords: Inside the Real Narcos | Channel 4 | documentary television program | 1 | 3 |
| Meet the Izzards | BBC One | — | — | — |
| Meet the Khans: Big in Bolton | — | — | — | — |
| Meet the Magoons | — | sitcom | — | — |
| Meet the Parents | E4 | — | 2 | 12 |
| Meet the Richardsons | U&Dave | mockumentary | 2 | — |
| Meet the Romans with Mary Beard | — | documentary film | — | 3 |
| Meet the Russians | — | reality television | — | — |
| Meet the Ukippers | BBC Two | — | — | 1 |
| Meet the Wife | BBC One | sitcom | 5 | 39 |
| Megamaths | BBC Two | — | 7 | 40 |
| Mel and Sue | — | talk show | — | — |
| Mel Giedroyc: Unforgivable | U&Dave | panel game, comedy television program | 3 | 8 |
| Melissa | — | — | — | — |
| Melody | — | — | 2 | — |
| Melvin and Maureen's Music-a-grams | — | — | — | — |
| Melvyn Bragg on Class and Culture | BBC Two | documentary film | 1 | 3 |
| Memory Bank | Channel 5 | game show | — | — |
| Men and Money | BBC Two | — | — | 6 |
| Men Behaving Badly | ITV | sitcom | 6 | 42 |
| Men in Kilts: A Roadtrip with Sam and Graham | Starz | documentary television program | — | — |
| Men in White | — | — | — | — |
| Men of Ideas | British Broadcasting Corporation | philosophy, talk show | 1 | 15 |
| Men Of Rock | — | documentary television program | 1 | 3 |
| Men of the World | BBC One | sitcom | 2 | 12 |
| Merlin | BBC One | fantasy television series, adventure television series, drama television series | 5 | 65 |
| Merlin: Secrets and Magic | BBC Three | — | 1 | 14 |
| Merseybeat | BBC One | drama television series | 4 | 38 |
| Mess Mates | — | — | — | — |
| Messiah | British Broadcasting Corporation | drama television series | 5 | 10 |
| Messiah | — | — | — | — |
| Messy Goes to Okido | CBeebies | — | 1 | 52 |
| Metal Mickey | ITV | sitcom, science fiction television series | — | — |
| Metropolis | ITV | thriller television series | 1 | 8 |
| Metrosexuality | Channel 4 | comedy drama, LGBT-related television series | 1 | 6 |
| Miami 7 | BBC Children's and Education | comedy television series | 1 | 13 |
| Mic and Mack | — | sitcom, children's television series | — | — |
| Micawber | — | drama television series | — | — |
| Michael Ball | ITV | — | 2 | 13 |
| Michael Bentine's Potty Time | — | — | — | — |
| Michael Jackson: The Trial | — | — | — | — |
| Michael McIntyre's Big Show | BBC One | — | — | — |
| Michael McIntyre's Comedy Roadshow | BBC One | comedy television series | 2 | 13 |
| Michael Moore Live | — | — | — | — |