I dressed all over in M&S thermals to see if it saved putting the

Dianne Bourne put Marks and Spencer's range of thermal wear to the test following advice to "heat the human, not the home"

2pk Heatgen™ Thermal Short Sleeve Vests (2-14 Yrs)

Heatgen™ Medium Fleece Thermal Top, M&S Collection

140 Denier Thermal Sheer Fleece Tights, M&S Collection

Savvy mum shares genius 'Monday to Wednesday' spending rule to

Equally perfect for layering or lounging, these versatile thermal leggings have your cold-weather comfort covered. Our innovative Heatgen Plus™ fabric

Heatgen™ Medium Thermal Leggings

Marks and Spencer fans ditch dressing gowns for 'gorgeous' £16

How to dress to keep warm - Chic at any age

M&S shoppers praise £16 thermal leggings that are 'perfect' for

I tried B&M's cheap thermals and they rival M&S for keeping warm

I dressed all over in M&S thermals to see if it saved putting the

M&S thermals help woman keep heating off for hours in 'impressive