I will echo Nick Arnull's comments.
Over the years, I have ordered several smocks from Robert (Lovell Workwear) for my own use and have recommended them to all my students and club members. Yes they are a small family business so sometimes they are worked off their feet (probably the situation getting ready for the Daventry show) but their products are excellent quality and great value for money.
And a few years ago, after chatting with Robert at the Harrogate show, he sent some extra material, free of charge, for me to make a pen pocket on my smocks. What more could you ask?
My only "complaint" is that they don't (yet) make small smocks, suitable for youngsters, but that may happen if demand increases