We love a good dupe; whether it’s a fashion or beauty buy to save you money, the high street brings the goods when it comes to more affordable alternatives. Marks & Spencer is a master of a dupe too, often selling purse-friendly options of designer buys you may not feel like forking out for. Case in point: their Square Neck Shirred Midaxi Smock Dress, which is a dead ringer for Sleeper’s cult £255 design.