Charles Tyrwhitt Men's Slim Fit Linen Blend Suit Jacket - 40REG - Soft Yellow - Available at M&S

Keep your cool on warmer days with this Charles Tyrwhitt jacket crafted from breathable linen blended with cotton. The single-breasted style is cut in a modern slim fit, with a two-button closure and a double back vent for easy movement. AMF stitching at the flap pockets, breast pocket and lapel collar adds a refined finish.