The ESB owns or controls certain parts of Hayes Island, in the middle of Portumna Bridge, on the Shannon at the upper end of Lough Derg. Many boats moor to the island: some had long-standing agreements with ESB and others had indirect arrangements. ESB has now, by posting a notice on a gate, given the boat-owners 21 days to remove their boats. It seems that the ESB was officially unaware that it had boats moored on its land, although it certainly made agreements with some of the boaters and it supplied electricity to others.
I have asked the ESB press office for information but it has not yet replied.
Irish waterways history 