In parts of the Republic of Ireland, Schuko was commonly installed until the 1960s. For safety reasons and to harmonize with the UK (with which Ireland has a long-standing free travel arrangement) and avoid having a different outlet type in Northern Ireland and the Republic of Ireland, the Republic standardized on BS 1363 (transposed into Irish Standards as IS 401 (Plug) and IS 411 (Socket outlet). Schuko has been phased out of use in Ireland and will be encountered very rarely. Some hotels provide a Schuko outlet alongside BS 1363 outlets for the convenience of visitors from the Continent.