Ulrika Jonsson, 53, 'signs up to Celebrity SAS: Who Dares Wins'

Ulrika Jonsson, 53, explains why she swapped 'uncomfortable' thongs for 'apple catcher' underwear

Ulrika Jonsson, 53, displays her enviable frame in 'apple catcher' underwear

Ulrika Jonsson admits daughter Bo has had to 'take some risks' by going to university