Although interestingly Berehaven did have something going for it. In 1898 the Admiralty upped the ante on the fortifications on Bere Island, which did become a significant military asset. A rail connection to Castletownbere could have proved useful perhaps in WW1, when the western naval bases were at full blast. But I suspect the 30s would have seen closure. On a related note, I wonder how the Berehaven, Swilly and Cobh treaty ports were supplied until 1938 and the final British withdrawal. The garrison troops may have been moved by sea, or possibly travelled by train in mufti. Some of the bulk stores may well have arrived by train, especially for the Cobh area. For those unaware of this little byway of Irish history, three UK garrisons were permitted to exist in the south between 1922 to 38 manning British naval bases. https://en.m.wikipedia.org/wiki/Treaty_Ports_(Ireland)