| Happy Ness: Secret of the Loch | TF1 | — | 1 | 13 |
| Harry Batt | BBC One | — | — | 1 |
| Harry Hill's Alien Fun Capsule | ITV1 | — | 1 | 7 |
| Harry Hill's Fruit Corner | BBC Radio 4 | — | 4 | 22 |
| Hattrick (TV program) | — | — | — | — |
| Hattytown Tales | TV Tokyo | — | 3 | 39 |
| Have Your Cake and Eat It | — | — | — | — |
| He Kills Coppers | — | — | 1 | 3 |
| Heads Up with Richard Herring | Pokerzone | — | — | 10 |
| Heart Breakfast with Wes Venn | — | — | — | 10 |
| Hearts and Minds | — | — | — | — |
| Heavy Pencil | Amazon Prime Video | reality television | — | 4 |
| Hedz | — | — | — | 28 |
| Hello 2021 | — | — | — | — |
| Henry VIII and His Six Wives (TV Mini-Series) | Channel 5 | — | 1 | 4 |
| High Street Blues | — | — | 1 | 6 |
| Hip neu Sgip? | — | — | — | — |
| History 101 | — | documentary | 2 | 10 |
| HMS Paradise | — | — | — | — |
| Hogmanay Live | BBC One Scotland | — | — | — |
| Hold the Back Page | — | — | — | — |
| Hollyoaks Favourites | — | — | — | — |
| Home Farm Twins | — | — | — | 30 |
| Homefront | — | — | — | — |
| Honour, Profit and Pleasure | — | — | — | — |
| Horace | — | — | — | — |
| Horrible Histories | BBC Children's and Education | — | 2 | 15 |
| Horrible Histories: Gory Games | BBC Children's and Education, CBBC | game show | 4 | 41 |
| How Do You Solve a Problem Like Camilla? | Channel 4 | — | — | — |
| How Green Was My Valley | — | — | — | — |
| How Safe Is Your House? | BBC One | — | — | — |
| How to Grow a Planet | — | documentary film, documentary television program | 1 | 3 |
| How Videogames Changed the World | Channel 4 | — | — | — |
| Hububb | BBC One | comedy | 5 | 64 |
| Hugh's Chicken Run | Channel 4 | — | — | 6 |
| Hung Out | Channel 4 | sitcom | — | — |
| I Can Cook | CBeebies | cooking show | 4 | — |
| I Didn't Know That | National Geographic | documentary television program | 3 | 31 |
| I Dreamed a Dream: The Susan Boyle Story | — | — | — | 1 |
| I Woke Up One Morning | — | — | — | — |
| I've Got Something To Tell You | W Network | — | 1 | 6 |
| Ian Hislop's Stiff Upper Lip – An Emotional History of Britain | BBC Two | — | 1 | 3 |
| Impossible Engineering | — | — | — | — |
| In Denial of Murder | — | — | — | 2 |
| In for a Penny | ITV1 | panel game | 2 | 17 |
| In Therapy | Channel 5 | — | 3 | — |
| Indian Matchmaking | Netflix | documentary | 1 | 8 |
| Indian Summer School | Channel 4 | documentary | — | — |
| Industrial Junkie | — | — | 1 | 10 |
| Industrial Revelations | Discovery Channel | documentary television program | 5 | 46 |
| Inside George Webley | — | — | — | — |
| Inside the Crown: Secrets of the Royals | ITV | — | 1 | 4 |
| Inside the Factory | BBC Two | — | 9 | 70 |
| International King of Sports | Channel 5 | — | — | — |
| Intikhab-e-Sukhan | MTA International | — | — | — |
| Introducing Tony Ferrino - Who? And Why? - A Quest | — | — | — | — |
| Irish Pickers | — | — | — | — |
| It Pays to Watch! | — | — | — | — |
| It'll Never Work | BBC One | — | 6 | 41 |
| It's Me or the Dog | Channel 4 | reality television | 4 | 38 |