On Wikipedia https://en.wikipedia.org/wiki/Choir_of_St_George%27s_Chapel,_Windsor_Castle
Alternative Spellings Choir of St George's Chapel at Windsor Castle
Creation 1348
City Windsor Castle, Crawford Place, London, UK
Country United Kingdom
Links Allmusic

The Choir of St George's Chapel at Windsor Castle exists to sing services in St George's Chapel at Windsor Castle.

It has been in existence since 1348 and, with the exception of the Commonwealth period (1649–1660), has sung services in the Chapel continuously ever since.

The choir comprises up to 23 boy choristers (5 of whom are probationers or training choristers) and 12 professional Lay Clerks, singing Countertenor, tenor and bass.. The Choir sings at Evensong each day (except Wednesdays) and twice on Sunday mornings during the three terms of the College year. The choristers are educated at St George's School, Windsor Castle which is situated in the Castle grounds. The Lay Clerks live in the Horseshoe Cloister and on Denton's Commons.

The choir sings regularly in the presence of the Queen and other members of the Royal Family. Significant recent events have included:
• the annual service for the Order of the Garter, Britain's highest order of chivalry
• Royal Maundy Service in 2016
• the marriage of Peter Phillips and Autumn Kelly in 2008
• the thanksgiving service for Edmund Hillary in 2008, televised live in New Zealand
• the baptism of James, Viscount Severn in 2008
• the thanksgiving service for HM The Queen's 80th birthday in 2006
• the Service of Prayer and Dedication on the marriage of Charles, Prince of Wales and Camilla, The Duchess of Cornwall in 2005
• the funeral of Princess Margaret in St George's Chapel and the thanksgiving service for her life held in Westminster Abbey in 2002
• the marriage of Prince Edward, Earl of Wessex and Sophie Rhys-Jones in 1999
Concerts are also given from time to time, some collaborating with ensembles such as the London Concert Orchestra, the London Handel Orchestra, Southbank Sinfonia and the London Mozart Players. The choir also broadcasts regularly on BBC Radio 3 and BBC Radio 4.

The choir is directed by the Director of Music and accompanied an Assistant Organist, plus an organ scholar who is selected by audition on an annual basis. Wikipedia