Marks and Spencer customers are singing praises about a budget-friendly winter jumper that they claim is 'soft against the skin'. Indeed, the knitwear is ideal for layering as it's 'not too thick' but still provides ample warmth when facing the unpredictable British weather. The Air-Yarn Crew Neck Jumper is available in sizes extra small to extra large, most of which are still up for grabs. It's been marked down to £16 from £20 in M&S's latest knitwear sale, but we've discovered a way to snag