The actress' show was feted with the Drama Serial honour at the ceremony just days after scooping the Best Drama Series accolade at the U.K.'s Broadcasting Press Guild Television and Radio Awards.

Other stars to receive top prizes at the Royal Television Society Awards included Brits Tom Hollander and Sarah Lancashire, who took home the Best Actor and Best Actress trophies for A Poet In New York and Happy Valley respectively.

Winners also included Scottish funnyman Billy Connolly, who landed the Presenter award for Billy Connolly's Big Send Off, and adventurer Bear Grylls, whose show The Island With Bear Grylls triumphed in the Popular, Factual and Features category.