| Twelfth Night | — | — | — | — |
| Twenty Thousand Streets Under the Sky | BBC Four | drama television series | 1 | 3 |
| Twenty Twelve | BBC Four | comedy television series | 2 | 13 |
| Twirlywoos | CBeebies, Family Jr. | action television series, adventure television series | 4 | 100 |
| Twisted Tales | — | — | — | — |
| Two Doors Down | — | — | 1 | 7 |
| Two Fat Ladies | BBC Two | cooking show | 4 | 24 |
| Two Greedy Italians | — | — | 2 | 4 |
| Two in Clover | Thames Television | sitcom | 2 | 13 |
| Two of a Kind | ITV | — | 6 | 69 |
| Two Pints of Lager and a Packet of Crisps | BBC Two, BBC Choice, BBC Three | sitcom | 2 | 12 |
| Two Thousand Acres of Sky | BBC One | — | 3 | 22 |
| Two Up, Two Down | BBC One | sitcom | — | 6 |
| Two Weeks in August | BBC One | drama television series | — | — |
| Two Weeks to Live | Sky One | action thriller, comedy television program | 1 | 6 |
| Two's Company | ITV | sitcom | 4 | 29 |
| Ty Pennington's Great British Adventure | — | — | 3 | 15 |
| Tycoon | ITV1 | reality television | 1 | 5 |
| Tyger Takes On... | BBC Three | documentary television program | 2 | 5 |
| UFO | ITV | science fiction television series, adventure television series | 1 | 26 |
| UFO Europe: The Untold Stories | — | — | — | — |
| UGetMe | — | — | — | — |
| UK Border Force | — | documentary television program | 2 | 18 |
| UK Late | — | — | — | — |
| UK Raw | — | — | — | — |
| UK Uncovered | — | reality television | — | 70 |
| UK Uncovered : Full On | — | reality television | — | 70 |
| UK Wrestling Mayhem | — | — | — | — |
| Ukwia | — | — | — | — |
| Ultimate Brain | BBC Children's and Education | game show | 3 | 30 |
| Ultimate Force | ITV1 | drama television series | 4 | 21 |
| Ultimate Guinness World Records | — | — | — | — |
| Ultraviolet | Channel 4 | science fiction television series, horror television series | 1 | 6 |
| Unacceptable | TLC | — | — | — |
| Unbreakable | Channel 5 | — | 1 | 8 |
| Unchosen | Netflix | — | 1 | 6 |
| Uncle | BBC Three, British Broadcasting Corporation | sitcom | 3 | 12 |
| Uncle Dad | ITV | — | 1 | 7 |
| Uncle Max | — | — | 2 | 26 |
| Under and Over | — | sitcom | — | — |
| Under the Hammer | — | — | — | — |
| Under the Moon | Channel 4 | — | — | — |
| Undercover | BBC One | — | 1 | 6 |
| Undercover | — | — | 1 | 6 |
| Undercover Dads! | — | children's television series | — | — |
| Undercover Heart | — | — | — | 6 |
| Undercover Princesses | BBC Three | docu-soap | 1 | 4 |
| Underground Ernie | CBeebies | — | — | 26 |
| Undermind | ITV | science fiction television series, drama television series | 1 | 11 |
| Uned 5 | S4C | children's television series | — | 1,159 |
| Unforgiven | ITV1 | drama television series | 1 | 3 |
| Unforgotten on Masterpiece | ITV | crime television series, drama television series | 5 | 30 |
| United | BBC Two | association football film | 1 | 6 |
| United! | — | — | 1 | 147 |
| University Challenge | ITV, BBC Two | quiz show | 53 | — |
| University Challenge 2016–17 | — | — | — | — |
| Unnatural Acts | Q1114052 | sketch comedy | 1 | 6 |
| Unnatural Causes | — | — | — | 7 |
| Unnatural Histories | BBC Four | nature documentary | 1 | 3 |
| Unnovations | Play UK | comedy television series | 1 | 10 |