It seems a long time since I last did a budget dress post, but I have to say that this Spring is a great time for those who like to find fashion bargains. Just a quick trawl of the web shows that a great many websites are offering rich pickings for bargain hunters, both through sales, money off discounts, and fashion at lower prices. So here are twenty dresses that cost under £30, with many of them costing less than £20. These are dresses for all occasions and comprise of many of the spring trends, including denim dresses, shirt dress styles and floral prints. If your idea of a perfect…