| Mapp and Lucia | Channel 4 | — | 2 | 10 |
| Marc | ITV1 | musical film | 1 | 6 |
| Marcella | ITV | drama television series, crime television series | 3 | 24 |
| Marie Antoinette | BBC Two | historical drama | 2 | 16 |
| Marion and Geoff | BBC Two | comedy television series | 2 | 17 |
| Mark Kermode's Secrets of Cinema | — | — | — | 14 |
| Mark Lawson Talks to... | — | — | — | — |
| Mark Wright's Hollywood Nights | — | reality television | 1 | 5 |
| Marked Personal | ITV | — | 1 | 90 |
| Market in Honey Lane | ITV | soap opera | 1 | 91 |
| Market Kitchen | — | cooking show | 2 | 506 |
| Marlene Marlowe Investigates | BBC One | children's television series | 2 | 26 |
| Marley's Ghosts | — | — | 2 | 9 |
| Marmalade Atkins | ITV | — | 2 | 21 |
| Marooned with Ed Stafford | — | — | 3 | 12 |
| Marriage Lines | BBC One | sitcom | 5 | 44 |
| Married at First Sight | Channel 4 | reality television | — | — |
| Married for Life | ITV | sitcom | 1 | 7 |
| Married Single Other | ITV | comedy drama | 1 | 6 |
| Martin Chuzzlewit | BBC Two | — | 1 | 6 |
| Martin Chuzzlewit | — | — | — | — |
| Martin Shaw: Aviators | — | documentary television program | — | — |
| Marty | — | comedy television series | — | — |
| Marvo the Wonder Chicken | Jetix | — | — | — |
| Mary & George | Sky Atlantic | historical drama, psychological drama film | 1 | 7 |
| Mary Berry Cooks | BBC Two | cooking show | 1 | 6 |
| Maryland | — | — | — | — |
| Mash and Peas | Q1114052 | — | — | — |
| Massive | BBC Three | sitcom | 1 | 6 |
| Massive! | — | — | — | — |
| MasterChef | BBC One, BBC Two | cooking show | — | — |
| MasterChef: The Professionals | BBC Two | — | 10 | 161 |
| Mastermind | BBC One | game show | — | — |
| Masterpiece | — | game show | 1 | 40 |
| Masters of Money | BBC Two | documentary film | 1 | 3 |
| Masterteam | — | game show | 3 | 135 |
| Match of the Day | BBC One | sports journalism | 51 | — |
| Match of the Day 2 | BBC Two, BBC One | — | — | — |
| Match of the Day Kickabout | CBBC | children's television series | — | — |
| Material Girl | BBC One | comedy television series | 1 | 6 |
| Maternal | — | — | — | — |
| Matilda and the Ramsay Bunch | BBC Children's and Education | — | 3 | 24 |
| Matt's Million | — | — | — | — |
| Max and Paddy's Road to Nowhere | Channel 4 | sitcom | 1 | 6 |
| May The Best House Win | — | game show | 5 | 131 |
| May to December | BBC One | sitcom | 6 | 39 |
| Maya | Channel 4 | — | — | — |
| Mayday | BBC One | — | 1 | 5 |
| Mayflies | — | — | — | — |
| 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 | — | — |