Edward VII (not sure where), VR Brighton, George VI (not sure where)
ER II (not sure where), George V box in Criccieth, VR in Chester.
George VI wallbox (not sure where), ER II (Bangor I think), Edward VII (Bangor)
Edward VII wallbox in Betws-Y-Coed, and ER II box and "posting box" outside Beaumaris Post Office.