| Year | Title | Role | Notes |
| 1995 | Children's Ward | Geraldine | 5 episodes |
| 1996 | Hetty Wainthropp Investigates | Photocopy Assistant | Episode: "Fingers" |
| 1998 | Picking Up the Pieces | Lucy | Series 1: Episode 7 |
| 1998–2000 | dinnerladies | Twinkle | All 16 episodes |
| 1999 | Sunburn | Sue | Series 1: Episode 5 |
| Coronation Street | Belinda Peach | Episode |
| Jonathan Creek | Marion Cretiss | Episode: "The Curious Tale of Mr. Spearfish" |
| 2000 | Clocking Off | Marie Leach | Episode: "The Leaches' Story" |
| 2001 | The Way We Live Now | Ruby Ruggles | TV mini-series; all 4 episodes |
| Linda Green | Receptionist | Episode: "Fitness Freak" |
| 2002 | Holby City | Tanya Wilton | Episode: "Pawns in the Game: Part 1" |
| Dalziel and Pascoe | Dr. Allison Laurie | Episode: "Mens Sana" |
| Hamilton Mattress | Lulu (voice) | TV short |
| 2003 | At Home with the Braithwaites | Trixie Fletcher | Series 4: Episode 3 |
| Early Doors | Janice | 4 episodes |
| 2004 | Christmas Lights | Pauline | Television film |
| 2004–2007 | Shameless | Veronica Ball | Series regular (series 1–3), guest (series 4); 26 episodes |
| 2005 | Faith | Linda | Television film |
| Messiah IV: The Harrowing | DS Vickie Clarke | TV mini-series; all 3 episodes |
| 2006 | See No Evil: The Moors Murders | Myra Hindley | Television film |
| 2007 | Confessions of a Diary Secretary | Tracey Temple |
| 2008 | Fairy Tales | Cindy Mellor | Episode: "Cinderella" |
| Bike Squad | WPC Kate McFay | Television film |
| Hancock and Joan | Joan Le Mesurier |
| Placebo | Dr. Sian Nuttall |
| The Devil's Whore | Elizabeth Lilburne | 4 episodes |
| Little Dorrit | Miss Wade | 7 episodes |
| 2009 | Red Riding: In the Year of Our Lord 1980 | Helen Marshall | Television film |
| Agatha Christie's Marple – They Do It with Mirrors | Jolly Bellever |
| The Street | Madeleine | Episode: "Past Life" |
| Criminal Justice | Juliet Miller | 5 episodes |
| 2010 | The Secret Diaries of Miss Anne Lister | Anne Lister | Television film |
| 2011–2014 | Silk | Martha Costello | All 18 episodes |
| 2012 | Henry IV, Parts I and II | Doll Tearsheet | TV dramas, part of the series The Hollow Crown |
| 2013–2014 | The Village | Grace Middleton | All 12 episodes |
| 2015 | Call Security | Narrator | Documentary |
| 2016 | Comic Strip – Red Top | Rebekah Brooks | Television film |
| A Midsummer Night's Dream | Titania |
| 2017 | Three Girls | Sara Rowbotham | 3 episodes |
| Black Mirror | Bella | Episode: "Metalhead" |
| 2018 | The Bisexual | Sadie | All 6 episodes |
| 2020 | Inside No. 9 | Nadia | Episode: "Thinking Out Loud" |
| Talking Heads | Miss Fozzard | Episode: "Miss Fozzard Finds Her Feet" |
| Mandy | Susan Blower | Episode: "Susan Bloody Blower" |
| 2022 | Anne | Anne Williams | TV mini-series; all 4 episodes |
| Rules of the Game | Sam Thompson | TV mini-series; all 4 episodes |
| Kelvin's Big Farming Adventure | Narrator | Six-part television series |
| 2023 | Star Wars: Visions | Kalina Kalfus (voice) | Episode: "I Am Your Mother" |
| 2024 | Say Nothing | Dolours Price | 7 episodes |
