| Monsignor Renard | ITV | — | 1 | 4 |
| Monster Café | British Broadcasting Corporation | — | 2 | 30 |
| Monster Munchies | — | cooking show | 2 | 20 |
| Monster TV | BBC Two | — | — | — |
| 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 | — | — | — |
| Moonstrike | — | anthology series | 1 | 27 |
| Mop and Smiff | BBC One | — | 1 | 13 |
| Mopatop's Shop | ITV | children's television series | 4 | 260 |
| More4 News | More4 | — | — | — |
| Morgana Robinson's The Agency | BBC Two | — | 1 | 7 |
| Morning Call | Q1023911, CNBC | business, news program | — | — |
| Morning Exchange | Q1023911 | — | — | — |
| Mortimer & Whitehouse: Gone Fishing | BBC Two | factual television program | 5 | 32 |
| Mortimer and Arabel | — | children's television series | 2 | 36 |
| Mortimer's Law | — | — | — | 6 |
| Moses | BBC One | documentary film | 1 | 1 |
| Moses Jones | BBC Two | — | 1 | 3 |
| Most Annoying People | BBC Three | — | 6 | 12 |
| Most Haunted | Sky Witness | — | 18 | 207 |
| Most Haunted Live! | — | — | — | — |
| Mother and Baby | — | — | — | — |
| Mother Love | BBC One | — | 1 | 4 |
| MotherFatherSon | BBC Two | drama television series | 1 | 8 |
| Motherland | — | — | — | — |
| Motive for Murder | — | drama television series | — | — |
| Motormouth | ITV | children's television series | 4 | 150 |
| Motorway Cops | BBC One | reality television | 7 | 33 |
| Mount Pleasant | — | comedy drama | 6 | 42 |
| Mountain | BBC One | documentary film | — | 5 |
| Mountain Gorilla | — | nature documentary | — | — |
| Mouse and Mole | BBC Children's and Education | — | 1 | 19 |
| Mouth to Mouth | BBC Three | comedy drama | 1 | 6 |
| Movie Connections | BBC One | documentary film | — | 16 |
| Movie Lounge | — | — | — | — |
| Movies, Games and Videos | ITV | — | 10 | — |
| Moving | ITV | sitcom | 1 | 6 |
| Moving On | BBC One | drama television series | 12 | 65 |
| Moving Pictures | — | — | — | — |
| Moving Story | — | — | — | 13 |
| Moving Wallpaper | — | comedy drama | 2 | 18 |
| Mr Bates vs The Post Office | ITV | docudrama | — | 4 |
| Mr Bloom's Nursery | CBeebies | children's television series | — | — |
| Mr Don & Mr George | — | sitcom | — | — |
| Mr Drew's School for Boys | — | — | — | — |