A spanner has reportedly been thrown into the works for the next series of Celebrity SAS: Who Dares Wins after three celebrities are said to have quit within days of each other.The show, which sees a group of celebs pushed to their limits in harsh conditions, has allegedly proved to be too much for some of this year's contestants as they seem to be dropping like flies. Weather girl turned TV presenter Ulrika Jonsson, 53, was reportedly the first of the pack to quit after hurting her back.