| All Night Long | British Broadcasting Corporation | sitcom | — | 6 |
| All or Nothing: Arsenal | Amazon Prime Video | — | — | — |
| All or Nothing: Juventus | — | — | — | — |
| All Our Saturdays | ITV | sitcom | — | 6 |
| All Our Yesterdays | — | — | — | — |
| All Over the Place | BBC Children's and Education | — | 7 | 65 |
| All Quiet on the Preston Front | BBC One | comedy drama | 3 | 19 |
| All Rise for Julian Clary | BBC Two | — | 2 | 13 |
| All Star Comedy Carnival | — | Christmas film | — | — |
| All Star Family Fortunes | ITV | game show | 12 | 127 |
| All Star Mr & Mrs | ITV1 | game show | 8 | 73 |
| All That Glitters: Britain's Next Jewellery Star | — | — | — | — |
| All the Small Things | BBC One | — | 1 | 6 |
| All Together Now | BBC One | talent show, entertainment television program | 2 | 6 |
| All You Need Is Love: The Story of Popular Music | — | documentary television program | 1 | 17 |
| All Your Own | — | — | — | — |
| All*Star Cup | — | — | — | — |
| Allsorts | ITV | children's television series | 9 | 211 |
| Alma's Not Normal | BBC Two | — | — | — |
| Almost Never | CBBC | — | 3 | 36 |
| Almost Royal | BBC America | — | 2 | 15 |
| Alone | — | survival competition show | — | 6 |
| Alone in the Wild | Channel 4 | nature documentary, documentary television film | — | — |
| Alphabet Castle | — | children's television series | — | — |
| Alphabet Zoo | — | — | — | — |
| Alphabetical | ITV | game show | — | 10 |
| Alright Now | — | — | — | — |
| Alternative Christmas message | Channel 4 | documentary television program | — | — |
| Always and Everyone | ITV | drama television series | 4 | 40 |
| Alys | — | — | 2 | 16 |
| Am I Being Unreasonable? | BBC One | — | — | — |
| Amadeus | Sky Atlantic | — | — | 5 |
| Amanda & Alan's Italian Job | — | documentary television program | — | — |
| Amandaland | BBC One | — | — | — |
| Amazing Greys | ITV1 | game show | 1 | 6 |
| Amazon | BBC Two | documentary film, documentary television program | 1 | 6 |
| Ambassadors | — | comedy television series | 1 | 3 |
| Ambulance | BBC One | — | 6 | 47 |
| America Was Here | — | documentary film | — | — |
| America: A Personal History of the United States | — | documentary film, news | — | 13 |
| American Dynasties: The Kennedys | — | — | — | — |
| Americana | — | — | — | — |
| Amnesia | ITV | — | 1 | 2 |
| Amser Te | — | — | — | — |
| An Age of Kings | BBC One | historical drama | 1 | 15 |
| An Audience with... | ITV1 | — | — | 55 |
| An Enemy of the State | — | — | — | — |
| An Evil Streak | — | — | — | — |
| An Idiot Abroad | Sky One | travel documentary, humor | 3 | 19 |
| An Island Parish | BBC Two | documentary film | 12 | 77 |
| An Là | — | — | — | — |
| An Ocean Apart | BBC One | — | 1 | 7 |
| An Optimist's Guide to the Planet | — | — | — | — |
| An t-Eilean | BBC Alba | — | — | — |
| An Unsuitable Job for a Woman | — | — | 2 | 10 |
| Anansi Boys | Amazon Prime Video | fantasy television series | — | — |
| Ancient Discoveries | History | documentary film | 6 | 39 |
| Ancient Egyptians | — | documentary television program | 1 | 4 |
| Ancient Inventions | — | documentary film | 1 | 3 |
| Ancient Rome: The Rise and Fall of an Empire | BBC One | documentary film, docudrama | — | 6 |