| 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 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 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 |
| 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 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 |
| Messiah | British Broadcasting Corporation | drama television series | 5 | 10 |
| 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 | — | — | — | — |
| Michael Palin in Nigeria | — | — | — | 3 |
| Michael Palin in North Korea | — | — | — | — |
| Michael Palin's Hemingway Adventure | British Broadcasting Corporation | documentary film | 1 | 4 |
| Michael Palin's New Europe | British Broadcasting Corporation | travel documentary | 1 | 7 |
| Michael Palin: Into Iraq | — | — | — | 3 |
| Mickey Dunne | — | — | — | — |
| Microbes and Men | — | — | 1 | 6 |
| Microsoap | British Broadcasting Corporation | children's television series, sitcom | 4 | 26 |
| Mid Morning Matters with Alan Partridge | — | sitcom | 2 | 12 |
| Middle Classes: Their Rise and Sprawl | BBC Two | — | 1 | 6 |
| Midnight Man | — | thriller television series | — | 3 |
| Midsomer Murders | ITV | detective television series, drama television series, mystery television series | 26 | 148 |
| Midwinter of the Spirit | — | — | 1 | 3 |
| Mighty Truck of Stuff | CBBC | — | 2 | 6 |
| Mike and Angelo | ITV | science fiction television series | 12 | 123 |
| Mike Bassett: Manager | ITV | sitcom | 1 | 6 |
| Mile High | — | soap opera | 2 | 39 |
| Mill of Secrets | — | drama television series | — | — |