I think Nigella looked the size I'd expect her too with the assistance of wet lycra .

Trinny apparently has battled self image problems and been told that she is too skinny for years .At one stage she defended accusations that she doesn't eat and  said that she had been 9 stone for the past 20 years .She is naturally thin.

In the picture above she looks quite healthy (those tops tend to squish breasts...she shouldn't wear them imo)  compared to this below (the headline is in poor taste too...What's eating Skinny Trinny)

http://www.dailymail.co.uk/tvshowbiz/article-1187128/Whats-eating-Skinny-Trinny-TV-star-worryingly-d...

it's sad that so much attention is paid to a women's outer image imo.