We tried Marks and Spencer thermals to help save on heating bills

Dianne wore the M&S Thermal Heatgen long-sleeved top, leggings and thermal socks from the range, priced from £10

Heatgen™ Medium Fleece Thermal Leggings, M&S Collection

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I tested the popular M&S thermals and didn't need to turn on heating for hours' - Mirror Online

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These long-sleeved, cotton-blend vests are ideal for their everyday essentials drawer. Crafted from soft thermal brushed fabric to keep them feeling

2pk Heatgen™ Thermal Vests (2-14 Yrs)

B&M selling 69p 'heat yourself not your home' products to help you save money on energy bills - Cambridgeshire Live

M&S thermals are saving people from turning on the heating this winter

When the temperature drops, our ultra-lightweight thermal long johns add a cosy extra layer. Regular fit, with supersoft seams, heatsealed care labels

2pk Heatgen™ Light Thermal Long Johns

M&S thermals are saving people from turning on the heating this winter

M&S thermals are saving people from turning on the heating this winter

Marks & Spencer's £12.50 clothing items hailed as so warm they 'help save money on heating bills' - MyLondon

I wore M&S viral £16 thermal leggings and I barely needed the heating on' - Rachel Williams - Daily Record

Heatgen™ Thermal Leggings (2-14 Yrs), M&S Collection