| Humf | CBeebies | children's television series | 2 | 80 |
| Hunderby | Sky Atlantic | — | 2 | 10 |
| Hunted | BBC One | drama television series | 1 | 8 |
| Hunted | Channel 4 | reality television | 8 | — |
| Hunter's Walk | ITV | detective fiction | 3 | 39 |
| Hunting Alice Bell | Channel 4 | — | — | 6 |
| Hurricane Man | U&Dave | documentary television program | — | — |
| Hustle | BBC One | drama television series | 8 | 48 |
| Hyperdrive | BBC Two | sitcom, science fiction television series | 2 | 12 |
| Hypothetical | U&Dave | panel game | — | — |
| I Am a Killer | Crime & Investigation Network | documentary television program | 2 | 20 |
| I Am Not an Animal | BBC Two | comedy television series | — | 6 |
| I Can Do That | NBC | game show | — | — |
| I Can See Your Voice | — | — | — | — |
| I Dream | British Broadcasting Corporation | sitcom, children's television series | 1 | 13 |
| I Hate Suzie | Sky Atlantic | black comedy | 2 | 11 |
| I Hate You | — | — | — | — |
| I Kissed a Boy | BBC Three | dating game show | — | — |
| I Kissed a Girl | BBC Three | dating game show | — | — |
| I Literally Just Told You | Channel 4 | game show | 2 | 14 |
| I Live with Models | Comedy Central | sitcom | 2 | 16 |
| I Love My Country | BBC One | panel game, comedy television series | 1 | 8 |
| I Love the '70s | — | — | — | — |
| I Love the '80s | BBC Two | — | — | — |
| I Love the '90s | BBC Two | — | — | — |
| I Never Knew That About Britain | — | — | 1 | 8 |
| I Remember Nelson | — | — | — | — |
| I Survived a Zombie Apocalypse | BBC Three | — | 1 | 8 |
| I Want My Wife Back | BBC One | sitcom | 1 | 6 |
| I Was a Rat | — | — | 1 | 3 |
| I'd Do Anything | BBC One | reality television | 1 | 22 |
| I'll Get This | BBC Two | — | — | — |
| I'm a Celebrity... South Africa | — | — | — | — |
| I'm a Celebrity...Get Me Out of Here! | ITV | reality television | 16 | 182 |
| I'm a Celebrity: Extra Camp | — | — | 19 | — |
| I'm a Celebrity: Unpacked | — | — | — | — |
| I'm Alan Partridge | BBC Two | sitcom, comedy film | 2 | 12 |
| I'm Bob, He's Dickie | ATV | comedy | 1 | 6 |
| I'm Famous and Frightened! | — | reality television, game show | 4 | 12 |
| I'm Spazticus | — | — | — | — |
| I'm with Stupid | BBC Three | sitcom | 1 | 6 |
| I've Never Seen Star Wars | BBC Four | — | 1 | 9 |
| I, Jack Wright | UKTV | drama television series | — | — |
| I, Lovett | BBC Two | sitcom | 1 | 7 |
| Ibiza Uncovered | Sky One | — | 7 | 56 |
| Ibrahim Khan The Animated Series | — | — | — | — |
| Ice Age Giants | BBC Two | documentary film | 1 | 3 |
| Ice Road Rescue | National Geographic | docu-soap | 10 | 77 |
| Ice Warriors | ITV | game show | 1 | 9 |
| Iceland Foods: Life in the Freezer Cabinet | — | documentary film | 1 | 3 |
| Iconicles | CBeebies | — | — | — |
| Icons | — | — | — | — |
| Ideal | BBC Three | sitcom | 5 | 39 |
| Identity | — | police procedural, drama television series | 1 | 6 |
| If I Ruled the World | BBC Two | panel game | 2 | 14 |
| If You See God, Tell Him | BBC One | sitcom | 1 | 4 |
| If... | — | docudrama | — | — |
| Igam Ogam | Channel 5 | — | 2 | 52 |
| Ill Behaviour | BBC Two | comedy television program, thriller | 1 | 3 |
| Imagine | BBC One | documentary television program | 35 | 211 |