Line of Duty star Keeley Hawes has defended the confusing ending of the crime drama’s second series, which drew criticism from some disappointed fans.

While creator Jed Mercurio was compelled to apologise to unhappy viewers when the series climaxed in March, Keeley – who starred as the show’s inscrutable main suspect DI Lindsay Denton – says she thought the ending matched the style of the drama.

Speaking exclusively to BT.com, the 38-year-old star said, “I know it was controversial but I think it is a show that isn’t tied up neatly at any time during its five hours.

“You’re constantly wondering and asking questions and trying to work out this mystery. I think it would’ve been wrong to wrap it neatly up in a bow at the end.”

The London-born actress was speaking at the launch of Right Click: Internet Safety Matters, a new partnership between BT and the charity Unicef which will help children in the UK stay safe online by running informative workshops in schools around the country.

Keeley also spoke of her upcoming appearance as a villain in Doctor Who, revealing her favourite moment to be shaking her body to create cheap special effects and describing the new partnership of Peter Capaldi and Jenna Coleman as “absolutely delightful”.