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• Association of Independant Organ Advisors
• British Institute of Organ Studies
• Council for the Care of Churches
• The Early English Organ Project
• Harrison & Harrison Ltd, Organ Builders
• Institute of British Organbuilding
• J.W.Walker & Sons, Ltd, Organ Builders
• Royal College of Organists
• Royal Institute of Bristish Architects
• Stephen Bicknell, Organ Consultant
• St Mary the Virgin, Twyford