1900 the church was one of the several which partly amalgamated with the United Presbyterian Church of Scotland to create the United Free Church of Scotland. It continued to be called St George's Free Church. In 1929 the United Free Church merged with the Church of Scotland with relatively few staying in the continuing church. The church was thereafter simply called St George's West and was operated by the Church of Scotland. History St Andrew's Church was the setting for the Disruption of 1843, one of the most significant events in 19th-century Scotland. Fuelled by increasing concern and resentment about the Civil Courts' infringements on the liberties of the Church of Scotland, around one third of the ministers present at the annual church's General Assembly walked out, cheered by onlookers outside, and constituted the Free Church of Scotland. In 1964, the congregation of St George's Church in Charlotte Square was united with St Andrew's, forming St Andrew's and St George's. The St George's Church building is now used by the National Records of Scotland. Today, the church hosts an annual book sale for Christian Aid. First held in 1974, in 2006 this event raised over £113,000, including the proceeds of the sale of the script of the Doctor Who episode "New Earth", signed by David Tennant and Billie Piper. In January 2010, the congregation of St Andrew's and St George's was united with St George's West, Shandwick Place, to form the congregation of St Andrew's and St George's West. Both buildings were in use for three years, with the former St Andrew's and St George's building as the principal place of worship until renovation work started in 2012. On 17 February 2013, St George's West church held its final Church of Scotland service; a special piece of choral music (which was dedicated to the choir of St Andrew's and St George's West Parish church) was written by Stuart Mitchell for the occasion. The congregation moved back to the church on George Street, and the Shandwick Place building was handed over to Charlotte Chapel, an independent Baptist church on the nearby Rose Street which had outgrown its building and purchased the church for £1.55 million. Charlotte Chapel don't expect to move in until 2016 while £750,000 worth of renovation work occurs, most prominently the re-siting of the centrally-located organ console to make way for a baptismal tank. This will be the