well as a nave division. It was built in 1886 by Henry Willis and subsequently rebuilt by the same firm in the mid-20th century. It was rebuilt by N. P. Mander in 1978 and reduced to three manuals at about that time. David Flood, Organist and Master of the Choristers for over 40 years, oversaw the redesign, specification and total expansion and rebuilding project of the Cathedral Organ in 2018–2020 The organ has now been fully restored and greatly enlarged, including reinstating the fourth manual, by Harrison and Harrison with work finishing in February 2020. Organists Organists and assistant organists at Canterbury Cathedral have included composers Clement Charlton Palmer, Gerald Hocken Knight and Philip Moore and musical directors Allan Wicks and Stephen Darlington. Following 42 years as both Assistant Organist and Organist and Master of the Choristers, David Flood retired on 29 December 2020. Following 10 years as Assistant Organist and latterly Director of the Girls' Choir and a period as Acting Director of Music, David Newsholme was appointed Director of Music in July 2021. The Assistant Organist is Jamie Rogers and he was appointed in December 2021. Choirs There has been a choral tradition at Canterbury Cathedral for 1400 years. The cathedral choir consists of up to 25 boy choristers and 12 lay clerks and choral scholars. The boys are aged eight to thirteen. They receive scholarships and attend St Edmund's School, Canterbury. There are seven choral services a week with Choral Evensong at 5:30 pm Monday through Friday, with the boys alone on Thursday and men on Wednesday. On Saturday and Sunday, there is evensong at 3:15 pm or 5:30pm and Eucharist on Sunday at 11 am. There are numerous extra services, especially at Christmas, Easter, and Pentecost. The Girls' Choir of Canterbury Cathedral was founded in 2014 and their first performance at Evensong, in January, was attended by more than 600 people and widely covered by the international press. They gave their first concert in December of that year. They now share their duties equally with the boys of the choir and sometimes work together. The girls are aged 12 to 18. They attend local schools in Canterbury and some further afield. Bells The cathedral has a total of 21 bells in the three towers: The South West Tower (Oxford Tower) contains the cathedral's main ring of bells, hung for change ringing in the English style. There