| Mobile | — | drama television series | 1 | 3 |
| Mock the Week | BBC Two, TLC | panel game, comedy television series | 15 | 181 |
| Model Behaviour | Channel 4 | reality television | 2 | — |
| Modern Times | — | — | — | — |
| Modern Toss | Channel 4 | — | 2 | 12 |
| Mog | ITV | sitcom | 2 | 13 |
| Mole Sisters | — | — | — | — |
| Moley | — | — | — | — |
| Moll Flanders | — | — | — | — |
| Molly and Mack | CBeebies | children's television series | — | — |
| Monarch of the Glen | BBC One | drama television series | 7 | 64 |
| Monarchy | Channel 4 | — | — | 17 |
| Monarchy: The Royal Family at Work | BBC One | documentary film | — | 5 |
| Monday Monday | — | drama television series | 1 | 7 |
| Mondo Macabro | — | — | — | — |
| Money | — | — | — | — |
| Money For Nothing | BBC One | — | — | — |
| Money Pit | — | — | — | — |
| Moneybags | — | — | — | — |
| Moneyball | ITV | game show | 2 | 14 |
| Mongrel Nation | — | — | — | — |
| Mongrels | BBC Three, British Broadcasting Corporation | sitcom | 2 | 17 |
| Monitor | — | documentary film | — | — |
| Monkey Business | — | — | — | — |
| Monkey Dust | BBC Three | satire, comedy television series | 3 | 18 |
| Monkey Life | Channel 5 | — | 9 | 134 |
| Monkey Magic | Channel 5 | — | 2 | 16 |
| Monkey Planet | — | nature documentary | 1 | 3 |
| Monkey Trousers | ITV1 | comedy television series | 1 | 5 |
| Monkman & Seagull's Genius Guide to Britain | BBC Two | — | 1 | 4 |
| Monkman & Seagull’s Genius Adventures | BBC Two | — | 1 | 4 |
| Monsignor Renard | ITV | — | 1 | 4 |
| Monster Café | British Broadcasting Corporation | — | 2 | 30 |
| Monster Moves | — | — | 6 | 31 |
| Monster Munchies | — | cooking show | 2 | 20 |
| Monster TV | BBC Two | — | — | — |
| Monsters We Met | Animal Planet | documentary film | 1 | 3 |
| Monty Don's French Gardens | BBC Two, BBC HD | — | 1 | 3 |
| Monty Don's Italian Gardens | BBC Two, BBC HD | documentary television program | 1 | 4 |
| Monty Don's Japanese Gardens | BBC Two | — | — | — |
| Monty Halls' Great Escape | — | — | — | — |
| Monty Python's Flying Circus | BBC One, BBC Two | comedy television series | 4 | 45 |
| Mood | BBC Three | — | 1 | 6 |
| Moody and Pegg | — | sitcom | 2 | 12 |
| Moon and Me | CBeebies | — | 1 | 50 |
| Moon and Son | BBC One | — | — | 13 |
| Moon Movies | — | — | — | — |
| Moonacre | — | mystery television series, family television series, mystery film, family film | — | — |
| Moonbase 3 | British Broadcasting Corporation | science fiction television series | 1 | 6 |
| Moondial | BBC One | — | 1 | 6 |
| Moone Boy | Sky One | sitcom | 3 | 18 |
| Moonfleet | — | — | — | — |
| Moonfleet | — | — | — | — |
| Moonflower Murders | BBC One | — | — | — |
| Moonlight on the Highway | ITV | — | — | — |
| Moonstrike | — | anthology series | 1 | 27 |
| Mop and Smiff | BBC One | — | 1 | 13 |
| Mopatop's Shop | ITV | children's television series | 4 | 260 |
| More Than Robbery | — | — | — | — |
| More4 News | More4 | — | — | — |