One of the Countries of the United Kingdom consist of Northern Ireland.  Who Does Northern Ireland co-operate with in some areas?
Northern Ireland Northern Ireland (Irish: "Tuaisceart Éireann" ] ; Ulster-Scots: "Norlin Airlann ") is a part of the United Kingdom in the north-east of the island of Ireland, variously described as a country, province or region. Northern Ireland shares a border to the south and west with the Republic of Ireland. In 2011, its population was 1,810,863, constituting about 30% of the island's total population and about 3% of the UK's population. Established by the Northern Ireland Act 1998 as part of the Good Friday Agreement, the Northern Ireland Assembly holds responsibility for a range of devolved policy matters, while other areas are reserved for the British government. Northern Ireland co-operates with the Republic of Ireland in some areas, and the Agreement granted the Republic the ability to "put forward views and proposals" with "determined efforts to resolve disagreements between the two governments".
Imperial Lighthouse Service The Imperial Lighthouse Service was the official General Lighthouse Authority for the British Empire. This was with the exception of: England and Wales, the Channel Islands, Gibraltar and the Falkland Islands (all dealt with by Trinity House); Scotland and the Isle of Man (dealt with by the Northern Lighthouse Board); and Ireland (dealt with by the Commissioners of Irish Lights). The Imperial Lighthouse Service came under the control of the Board of Trade and was responsible for the provision and maintenance of navigational aids such as lighthouses, lightvessels, and buoys in all colonies of the British Empire. With the end of the British Empire most of these light houses were taken over by the newly independent countries and the Imperial Lighthouse Service stopped its operations by the late 1970s.