Basildon’s Denise Van Outen has discussed her role in a special episode of Fireman Sam.

The actress voices a character in the new feature-length special Fireman Sam: Norman Price And The Mystery In The Sky.

The 46-year-old has lent her voice to Professor Polonium, who “wreaks havoc across Pontypandy as she tries to prove she’s the best hero”.

Denise said: “I always wanted to voice a character in animation, but I always said if I’m going to do it I’d rather play a bit of a baddie, or someone that causes a bit of trouble because it’s quite nice to just play around with your voice and also just create this character. I loved every second of it.”

The episode airs on childrens’ channel Cartoonito on Saturday at 5pm.