It was a warm, sunny afternoon when we visited. The site was deserted so we had the place to ourselves. The castle seemed hard to find. We passed through Old Bolingbroke twice but then discovered we had missed a sign in the centre of the village and eventually, down a very narrow lane, we found the entrance by the lovely old cottage below.
The plan below shows the layout of the castle. Most of the information boards were faded and hard to photograph.
The plan is based on discoveries made during excavations carried out between 1965 and 1973. The great hall and kitchens have since been re-buried to protect them.