An absolute workwear essential, long sleeve shirts now come in a variety of fits so it's never been easier to get a more tailored look. Pick bold colours or prints to instantly inject some much-needed personality into (let's be honest) a pretty boring black suit. Or go for soft pinks and blues if you're wearing under a grey suit or blazer.
If you love your accessories, make sure you go for a long sleeve shirt with unbuttoned cuffs so you can wear it with statement cufflinks. Then when the drinks are flowing in the evening after work, roll up the cuffs, ditch the tie and before you know it you'll be back in that ever so familiar zone we all know as smart casual.