One of my ex-seagoing colleagues forwarded this to me earlier:-
A British Admiralty Navigation Warning
WZ 119/21 041955 UTC Feb 21
IRISH SEA, EASTERN PART.
Liverpool Bay Northwards.
Exposed power cable in position 53-45.0N 003-24.3W.
Wide berth requested.
That position is about 15 miles or so NW of Southport No mention of voltage etc.
Not the sort of job that Alan or UKPN would likely want...
Clive