Currently researching U-boat World War 1 activity on the west coast of Ireland. Attached is a copy of Defence of Realm Act Nov 1914.
Also attached is a copy of a Petty Court Session in Mayo 1918, Steelaun where a relative of mine was fined for having a light in her house visible during sunset and sun rise in contravention of realm act. There was U Boat activity all around this coast line area. There is also anecdotal info on U Boats stopping at lighthouses, isolated inlets along coast etc. for fresh supplies as bread, milk from sympathetic parties?
Please note electrifcation did not occur until the late 1940S