Topshop Boutique Mini Collar Smock, £70.
I think this is a great wardrobe staple, especially for SS10! The colourway is spot on, and well, you can never fail with a smock. A smock dress hides a multitude of sins (ahem) and this style is great to wear with tights and boots for colder days or wear with bare legs and wedges for summer! BOOM