In the United Kingdom, Her Majesty's Coastguard fulfill six of the nine functions required by the IMO, Search and Rescue, Pollution Response, Vessel Traffic Management, Maritime Safety, Accident and Disaster Response and Maritime Security. The remaining three IMO functions, Customs/Border Control, Fisheries Control and Law Enforcement are undertaken by the Border Force, Environment Agency and police forces, respectively. HM Coastguard has no role in the maintenance of seamarks which is instead the responsibility of Trinity House, the Northern Lighthouse Board (in Scotland) and the Commissioners of Irish Lights (in Northern Ireland).