Wearing a shirt under a jumper isn’t as easy as you may think. Rather than simply throwing a knit over any-old shirt, it should be a more considered affair — especially if you want to get your look just right. Here, men’s knitwear retailer House of Fraser shares their tips for styling this winter essential. Follow these simple guidelines and you can’t go wrong! Choose the neckline of your knit While women may have a multitude of necklines to choose from, it’s a lot simpler for men, as they’re categorised into two groups: crew necks and V-necks. Crew jumpers have…