Parking is found at the superstore nearby. In fact the store was built where the Post Office sorting office used to be.
Whenever I was away from Peterborough (which is often) I used to enjoy seeing the Post Office as I was pulling into Peterborough train station. The sight of it meant I was home and the journey was over. Even though it was an eyesore I really miss it and I want to keep the memory of it alive.
Please don't twist the cache container to open it, the lid is hinged. Watch out for Muggles and if you have kids with you make sure they take care as the road next to the path can be busy.