Walking in Watford town centre I noticed this large spider. It was moving at a good (spiderly) pace so applogies for the blur on the photo. The abdomen is about the size of a walnut, i.e. it's large. It's unlike any spider I've ever seen. I'd love to know what it is please.
This is one of the Araneus species (includes A. quadratus one of the largest UK spiders & A. diadematus the garden spider). There are gravid females around this time of year, colouring can vary greatly, but they are not that uncommon.