My virtual ears always prick up whenever I hear that Net-a-Porter’s bi-annual sale has begun; partly for the nostalgia of buying my first few ‘designer’ items from there in my early twenties, and also in part because it’s a great opportunity to pick up those wardrobe staples at a discounted price. I’ve been doing pretty well at sticking to the rules of the 5PFW Challenge, but I couldn’t help but have a quick peek through some of my favourite designers. At this stage, I’m not planning on buying anything, but I do enjoy a good window shop, and I thought…