there is a wide range of smaller industries, mostly in industrial and business parks, especially at llangefni and gaerwen. these include an abattoir, fine chemical manufacturing, and factories for timber production, aluminium smelting, fish farming and food processing. the island is on one of the main road routes from britain to ireland, via ferries from holyhead, off the west of anglesey on holy island, serving dún laoghaire and dublin port.