£16 M&S buy that's 'essential' for 'keeping warm' and 'helps keep heating costs down'

Temperatures have dipped in the UK, and the cold spell means finding ways to stay warm in and outside of the house.

The thermals range may not be a brand new addition to Marks and Spencer’s, but this could be the perfect time to stock up.

While the cold snap won’t last forever, simple but effective layers can be brought out every winter, for the ultimate cost per wear.

M&S’ thermal long-sleeved top is classic, timeless and easy to wear, plus it will only you set back by £16.

Buy: Heatgen™ Medium Thermal Long Sleeve Top (£16)

The tops can be worn alone or as a hidden layer underneath dresses, jumpers and more.

They come in UK sizes 6-22 and nine different colours – two are sold out but there are still seven to choose from, including neutral black, brown and cream shades, and pops of colour.

The stretchy fabric features Heatgen Plus™ technology to insulate and keep the warmth in, and a soft, brushed inner layer.

Thousands of reviewers have rated the thermal piece five-stars, with some calling it ‘wonderfully cosy”.

Soozeh said: ”These are so wonderfully cosy and comfortable to wear. I have several colours and seem to be wearing one virtually every day! Helps keep the heating costs down too! I also like that they are fairly long.”

Fab u lous commented: ”This is one of many thermal tops I have from M&S. These tops are essential to keep me warm in Winter. I wear it under my cashmere jumpers for extra warmth. I couldn’t live without them, especially the thicker extra warm ones! I hope M&S keep these tops as a permanent line.”

1sungirl also added: ”A lovely warm top, though I found it a little tight fitting.”

As some reviews have mentioned that the sizing is small, it could be worth sizing up for a better fit.