also maintains two temples in England, the first opening in the London area in 1958, and the second completed in 1998 in Preston and known as the Preston England Temple. Preston is also the site of the first preaching by LDS missionaries in 1837, and is home to the oldest continually existing Latter Day Saint congregation anywhere in the world. Restored 1994–2000, the Gadfield Elm Chapel in Worcestershire is the oldest extant chapel of the LDS Church. Other non-Trinitarian denominations Jehovah's Witnesses had 137,631 "publishers" (a term referring to members actively involved in preaching) in the United Kingdom in 2015. The Church of Christ, Scientist is also represented in the UK. The General Assembly of Unitarian and Free Christian Churches is the umbrella organisation for Unitarian, Free Christian and other liberal religious congregations in the United Kingdom. The Unitarian Christian Association was formed in 1991. There are an estimated 18,000 Christadelphians in the UK. Islam Estimates in 2009 suggested a total of about 2.4 million Muslims over all the United Kingdom. According to Pew Forum on Religion and Public Life, the number of Muslims in Britain could be up to 3 million. The vast majority of Muslims in the United Kingdom live in England and Wales: of 1,591,126 Muslims recorded at the 2001 Census, 1,546,626 were living in England and Wales, where they form 3 per cent of the population; 42,557 were living in Scotland, forming 0.8 per cent of the population; and 1,943 were living in Northern Ireland. Between 2001 and 2009 the Muslim population increased roughly 10 times faster than the rest of society. Most Muslim immigrants to the United Kingdom came from former colonies. The biggest groups of Muslims are of Pakistani, Bangladeshi, Indian and Arab origins, with the remainder coming from Muslim-dominated areas such as Southwest Asia, Somalia, Malaysia, and Indonesia. During the 18th century, lascars (sailors) who worked for the British East India Company settled in port towns with local wives. These numbered only 24,037 in 1891 but 51,616 on the eve of World War I. Naval cooks, including Sake Dean Mahomet, also came from what is now the Sylhet Division of Bangladesh. From the 1950s onwards, the growing Muslim population has led to a number of notable Mosques being established, including East London Mosque, London Central Mosque, Manchester Central Mosque, London Markaz, Baitul Futuh of the Ahmadiyya Muslim Community and Cambridge Central Mosque. According