John Deighton worked in the coal industry.
This is a list of notable companies based in Ireland , or subsidiaries according to their sector .. Ireland. Ireland. It includes companies from the entire island .. The state of the Republic of Ireland covers five-sixths of the island , with Northern Ireland , part of the United Kingdom , covering the remainder in the north-east .. Ireland. Ireland. Republic of Ireland. Republic of Ireland. Northern Ireland. Northern Ireland. United Kingdom. United Kingdom. Each has separate regulatory and registration authorities .