Nice one, Ian. Superb pics!
Haven't seen an emplacement like that myself yet. Are the defences on Bawdsey beach anywhere near the old Chain Home station? It
is Bawdsey I'm thinking of?!
There are also anti-tank blocks on the beach at Seahouses in Northumberland, and a pillbox on the dunes next to a deserted Coastguard lookout on the road to Bamburgh.
If you go south of Seahouses, there's a roadside pillbox on the back road to Alnwick, not far from the wartime airfield.
I just sent a report form and the pics of Burntisland beach to the RCAHMS in Edinburgh, so they
should be online in the NMR in the next few weeks.