Charles Tyrwhitt Men's Pure Merino Wool Button Neck Jumper - Grey - Available at M&S

Knitted from pure merino wool, this Charles Tyrwhitt jumper is a luxurious smart-casual layer. The button-neck design allows you to wear it in a sharp collared style, or as a stylish high neck piece. Ribbed trims at the cuffs and hem make for a neat finish.