I've spent a little while studying the various Peterborough signalbox diagrams. I have to say that operation must have been very interesting. The down goods starts on the down side, crosses to the upside at Spital Junction and crosses back to the downside at Werrington Junction. There seems to be various routes through the yards, crossed by up road lines, loco lines, transfer lines and just about anything else. The up goods fairs a little better but look at the up goods departure at Peterborough North..This really has to be an afterthought?