Anglesey Sqn Search and Rescue Helicopters, both units providing employment for about 500 civilians. RAF Valley is now the headquarters of 22 Sqn Search and Rescue. There is a wide range of smaller industries, mostly located in industrial and business parks, especially at Llangefni and Gaerwen. These include an abattoir and fine chemical manufacturing, as well as factories for timber production, aluminium smelting, fish farming and food processing. The island is also on one of the major routes from Britain to Ireland, via ferries from Holyhead, off the west of Anglesey on Holy Island, serving Dún Laoghaire and Dublin Port. Much
Holy Island, Anglesey scientific interest – Beddmanarch–Cymyran. Holy Island is connected to Anglesey by two road links. The first, the Stanley Embankment, is made up of causeways carrying the A5/A55 and the main railway line to Chester and London, and the original bridge of the A5 post road. The second is Four Mile Bridge, which carries a 'B' road and is much smaller. The main settlement is the port of Holyhead, from which passenger ferries travel to Dublin Port, Ireland, and freight ferries also travel to Dublin. Holyhead railway station is located in the town. Other settlements include the villages of Trearddur Bay,