Who stole the bridge?

Today we walked at Pigbush. We did a circular walk over the causeway by the bog and then round through the woods. At the end ogf this walk we cross the stream via a little footbridge.....but when we got there the bridge was closed and we had to wad across the stream. Fortunately we had boots on. They are rebuilding the bridge and we passed signs on the way back to the car saying no admittance . Too bad they didn't tell us before we started out!