Roundhouse Village Entranceway - Shurely shome mishtake?

"You are looking out over the remains of the Entranceway to the Round House Village that was built about 500BC. This was protected by a bastion on either side, and the observation platform where you are now standing was built on the site of the southern bastion. Between the bastions was a set of gates with a walkway above them. These in turn were protected by a defensive hookwork wall (the remains of which may be seen to your right) that was entered through an outer gate. A visitor could be kept between the two sets of gates and questioned before entering the village."

All of which is all very well, except for the fact that none of the above makes much sense now that the information board, which C-H-M snapped at Easter this year, is no longer mounted on top of the rampart on the observation platform, now destroyed, but instead on the lefthand side of the entrance through the rampart. I suspect there may be some confused grockles ...

Update: Dr Ferris observes: "In the reconstruction drawing I think the Iron Age defenders of Crickley should be depicted occupied in fending off that massive butterfly. It could really do some damage otherwise."