I just don’t have the conviction, and I feel as though I’m not dedicated enough," one celebrity candidly admitted.

Hannah Spearritt is an original member of pop group S Club 7 who, alongside her singing career, has dabbled in the acting world and is well known for playing the role of Abby Maitland in Primeval, Mercedes Christie in Casualty and Kandice Taylor in EastEnders.

The "unforgiving" Welsh terrain gives competitors on Channel 4's new series of Celebrity SAS: Who Dares Wins a true experience of special forces training, according to the show's chief instructor Billy Billingham.