Ray, (or anyone for that matter), where exactly is Possett Bridge? I've probably discovered it on one of my many adventures as a young boy but I don't know it by name.
/edit : forget that, a little googling got me the answer. It's the one with the little arched footway under the road at the corner of Stockport Rd, Strines Road? Where they used to lead their barge horses under the road. Apparently that point in marple is coincidentally 427 ft above sea level (same as Marple's phone number).