| A Mind to Kill | S4C | drama television series | 5 | 22 |
| A Mother’s Son | ITV | — | 1 | 2 |
| A Passion for Churches | BBC Two | documentary film | — | — |
| A Perfect Hero | ITV | — | 1 | 6 |
| A Perfect State | British Broadcasting Corporation | sitcom | 1 | 7 |
| A Picture of Britain | BBC One | documentary film | 1 | 6 |
| A Pin to See the Peepshow | — | — | — | — |
| A Pinch of Snuff | — | — | — | 3 |
| A Place in the Sun | Channel 4 | — | — | — |
| A Present for Dickie | — | — | — | — |
| A Prince Among Men | BBC One | sitcom | 2 | 12 |
| A Profile of Arthur J Mason | — | — | — | — |
| A Question of Europe | BBC One | broadcast debate | — | — |
| A Question of Genius | BBC Two | game show | 2 | 45 |
| A Question of Sport | BBC One | panel game | 50 | 1,285 |
| A Rough History of Disbelief | — | — | — | — |
| A Rubovian Legend | — | — | — | — |
| A Scandal in Bohemia | — | — | — | — |
| A Seaside Parish | — | documentary film | — | — |
| A Season With McLaren | BBC Two | documentary film | 1 | 7 |
| A Sharp Intake of Breath | ITV | sitcom | 4 | 22 |
| A Show Called Fred | Associated-Rediffusion | — | — | 5 |
| A Small Problem | — | sitcom | — | — |
| A Spy Among Friends | ITVX | espionage television series, thriller | 1 | 6 |
| A Stab in the Dark | — | — | — | — |
| A Statement of Affairs | — | — | — | — |
| A Tale of Two Cities | MGM+ | historical drama | — | 4 |
| A Tale of Two Cities | ITV | historical drama | 1 | 2 |
| A Tale of Two Cities | — | — | — | — |
| A Tale of Two Cities | — | — | — | — |
| A Taste for Murder | — | — | — | — |
| A Touch of Frost | ITV1 | detective fiction, drama television series | 15 | 42 |
| A Town Called Malice | Q108084483 | thriller | — | — |
| A Very British Airline | BBC Two | factual television program | 1 | 3 |
| A Very British History | BBC Four | — | — | — |
| A Very British Scandal | BBC One | drama television series, historical drama | 1 | 3 |
| A Very English Scandal | BBC One | comedy drama, LGBT-related television series, historical drama | 1 | 3 |
| A Very Peculiar Practice | BBC Two | comedy drama | — | 15 |
| A Very Royal Scandal | Amazon Prime Video | historical drama | — | 3 |
| A View from the Terrace | BBC Scotland | — | — | — |
| A Whole Lifetime with Jamie Demetriou | — | — | — | — |
| A Woman of Substance | Channel 4 | historical drama | 1 | 8 |
| A World of His Own | — | — | — | — |
| A Year in the Life of a Year | — | — | — | 1 |
| A Year in Tibet | — | — | — | — |
| A Young Doctor's Notebook | — | comedy television series | 2 | 8 |
| A-Z of Rude Health | — | — | 1 | 6 |
| Aaagh! It's the Mr. Hell Show! | BBC Two | sitcom | 1 | 13 |
| Aap Kaa Hak | — | — | — | — |
| Abandoned Engineering | — | docutainment | 11 | — |
| Abigail and Roger | BBC One | sitcom | 1 | 9 |
| Above Suspicion | ITV | drama television series | 4 | 11 |
| Absolute Cobblers | — | game show | 1 | — |
| Absolute Genius with Dick and Dom | CBBC | documentary film | 5 | 49 |
| Absolute Power | BBC Two | sitcom | 2 | 12 |
| Absolutely | Channel 4 | — | — | 28 |
| Absolutely Fabulous | BBC One | sitcom | 5 | 39 |
| Access | — | — | — | — |
| Accidents Can Happen | BBC One | — | — | — |
| Accused | BBC One | anthology series, drama television series | 2 | 10 |