English Harbour rums are produced by Antigua Distillers on the Caribbean Island of the same name. English Harbour is a port on the island. Its name was given by the Royal British Navy when they set up a naval base there in the 18th century.
Outside of the Caribbean, Antigua Distillers are best recognised for their English Harbour rums. The 5 year old is regularly held up as being a classic (I didn’t share that view in my review though). Within the Caribbean they are best known for their Cavalier brand of rums. Less expensive rums used mostly for mixing. Much like St Lucia Distillers produce Bounty for their own domestic and more localised market.