Organization Church Monuments Society

Tower of London Armouries

Victoria and Albert Museum

Society of Antiquaries

Arms and Armour Society

Monumental Brass Society

Medieval Dress and Textile Society

Council for the Care of Churches (Church Buildings Council)

Churches Conservation Trust.

Goldsmiths' Company

Reading University

Friends of Reading Abbey

Graduate Center for Medieval Studies

Reading & District Natural History Society

Berkshire, Buckinghamshire and Oxfordshire Wildlife Trust

Royal Society for the Protection of Birds

University of South Wales

National Museum of Wales (Honorary Research Fellow)

Gwent Historical Association (General and Editorial Committee Member)

Gwent Local History Council

Glamorgan History Society (Committee Member)

Monmouthshire Antiquarian Association

South Wales Record Society (President, 2010-2013)

Welsh History Forum