Sounds fun/fascinating, I def need to learn more about the deployment of British AA in WW2 though, that site looks impossibly small for a Battery, or even a Battery minus.
What I mean is that although it physically fits, no-one in their right mind these days would put four gun positions basically on top of each other, and I'd be very surprised if it was an SOP at the time. You could argue that it's meant to be a tempting target, but then it just looks so wrong that I'd expect the greenest pilot to smell a rat.
Curious.. though a quick bit of googling suggests that the experts are agreed, I guess they just did things differently back then! :-o