Xand van Tulleken and Helen Lawal oversee proceedings as three more pairs road test some of the most popular and talked about diets. Sandra and Cherise hope to lose a dress size for a 30th birthday party, Dan and Rob from Stoke want to get fit for a charity football match and Pip and Donna have four months to slim down for a muddy obstacle race. Xand also investigates gastric balloon pills and whether he can freeze away his stomach fat.