| Y Byd ar Bedwar | — | — | — | — |
| Y Goleudy | S4C | — | — | — |
| Y Stiwdio Gefn | — | — | — | — |
| Yanks Go Home | ITV | sitcom | 2 | 13 |
| Year of the Rabbit | — | — | — | — |
| Yeardot | — | — | — | — |
| Years and Years | BBC One | science fiction television series | 1 | 6 |
| Yellowstone | BBC Two | nature documentary | — | 3 |
| Yellowthread Street | ITV | police procedural | 1 | 13 |
| Yes Minister | BBC Two | comedy television series, political satire | 5 | 37 |
| Yes, Honestly | London Weekend Television | sitcom | 2 | 26 |
| Yes, It's the Cathode-Ray Tube Show! | — | — | — | — |
| Yes, Prime Minister | British Broadcasting Corporation | sitcom, political satire | 2 | 16 |
| Yesterday's Dreams | ITV | drama television series | 1 | 7 |
| Yesterday, Today & The Day Before | — | comedy, current affairs, political satire, late-night talk show | — | — |
| Yoho Ahoy | BBC Children's and Education | — | 2 | 39 |
| Yoko! Jakamoko! Toto! | CITV, CBeebies | children's television series | 2 | 28 |
| Yonderland | — | — | 3 | 16 |
| Yorkshire Firefighters | BBC Two | — | 1 | 4 |
| You and Me | BBC One | — | — | — |
| You Are Here | BBC One, Starz | drama television series, romance television series | — | 8 |
| You Are What You Eat | Channel 4 | — | 4 | 9 |
| You Can't Win | ITV | drama television series | 1 | 7 |
| You Cannot Be Serious | — | — | 1 | 6 |
| You Don't Know Me | — | crime fiction | — | — |
| You Don't Know You're Born | ITV1 | — | 1 | 3 |
| You Have Been Watching | Channel 4 | panel game | 2 | 16 |
| You Know What People Are | — | — | — | — |
| You Look Stunning Too | — | comedy television program, romance television series | 1 | 6 |
| You Must Be The Husband | BBC One | sitcom | 2 | 13 |
| You Rang, M'Lord? | BBC One | sitcom | 4 | 26 |
| You Saw Them Here First | — | — | — | 7 |
| You Should Be So Lucky | British Broadcasting Corporation | — | — | 12 |
| You Vs. Chris & Kem | — | — | — | — |
| You're Back in the Room | — | — | 2 | 10 |
| You're Only Young Twice | ITV | sitcom | 4 | 31 |
| You're Only Young Twice | — | — | — | — |
| You've Been Framed! | ITV | — | 30 | 471 |
| You, Me & Them | — | comedy | — | — |
| You, Me and the Apocalypse | Sky One, NBC | comedy drama, science fiction television series | 1 | 10 |
| Young Apprentice | BBC One | reality television | 3 | 22 |
| Young at Heart | — | — | 1 | 8 |
| Young Charlie Chaplin | — | — | — | 6 |
| Young Dracula | BBC One | children's television series, vampire television program | 5 | 66 |
| Young Hyacinth | BBC One | comedy film | — | 1 |
| Young James Herriot | BBC One | — | 1 | 3 |
| Young Nation | — | — | — | — |
| Young Scientists of the Year | BBC One | — | 14 | 14 |
| Young Sherlock | Amazon Prime Video | action television series, adventure television series, mystery television series | 1 | 8 |
| Young Sherlock: The Mystery of the Manor House | — | police film | 1 | 8 |
| Young Wallander | Netflix | drama | 2 | 12 |
| Young, Dumb and Living Off Mum | BBC Three | reality television | 3 | 18 |
| Young, Gifted and Broke | ITV | — | 1 | 7 |
| Young, Nazi and Proud | Channel 4 | — | 1 | 1 |
| Youngers | E4 | comedy drama | 2 | 16 |
| Your Face Sounds Familiar | ITV | talent show, reality television | 1 | 6 |
| Your Home in Their Hands | BBC One | — | 1 | 6 |
| Your Home Made Perfect | — | — | — | — |
| Your Life in Their Hands | — | documentary film | — | — |
| Your Mother Wouldn't Like It | ITV | — | — | — |
| Your News | — | — | — | — |
| Your Wardrobe | — | — | — | — |
| Yunnan Adventure with Nigel Marven | Eden | — | — | — |
| Yus, My Dear | London Weekend Television | sitcom | 2 | 19 |