Organizations: M
Mansfield Traquair Trust
Mansion House
Many Press
Marchmont Hall
Marconi plc
Marcus Ward and Co.
Margaret Barnes School of Dancing
Margaret Cavendish Society
Margery Kempe Society
Maria Grey Training College
Marianne North Gallery
Marie Curie Hospice
Marie Stopes Health Clinic
Marie Stopes International
Marine Biological Association
Marine Motoring Association
Marine Society
Marion Boyars
Marion E. Wade Center
Marion Malkin Memorial Bowl
Marists
Mark Morris Dance Group
Market Bosworth Grammar School
Market Research
Market Street Railway Company
Markova-Dolin Ballet
Marks and Spencer
Marlborough College
Marmite Food Company
Married Women's Association
Married Women's Property Committee
Marsden Town School
Marsh and Miller
Marsh's Library
Marsh, Stacey, and Graham
Marshall and Russell
Marshall and Snelgrove
Marshall Brothers
Marshall Japp and Company
Marshalsea Prison
Martin Booth
Martin Secker and Warburg Limited
Marvel
Marvell Press
Marxist-Feminist Literature Collective
Mary Datchelor School
Mary Erskine School
Mary Ingraham Bunting Institute
Mary Russell Mitford Society
Mary Ward Centre