Came across this when looking for something else to do with AA (as is always the case!!!), and thought it worth sharing as it gives a very clear view of the gun site layout. It's one of the better preserved sites in the UK, but has, as always, had the graffiti artists in attendance.
That was interesting for me as my father described being in an AA battery in Dover during 1941. I had no idea what these gun sites looked like when I published his diary. Apparently a bomb landed right in the doorway of one...though luckily didn't explode!
