DeAR Deidre,

should I worry about my husband spending all his time rifling through my knicker drawer?

not if he is mathematician Dr James Hind, from nottingham, who spent his spare time studying his wife’s tights collection to find the perfect thickness for different weather conditions. He came up with an equation that compared wind chill, wind direction, gusts and temperature to depth of denier required to keep cosy.

James, can I say something? So sweet of you to do this but most women can make this calculation in their head, while they are filling