National Trust | National Trust for Places of Historic Interest or Natural Beauty | International Fund for Agricultural Development | Agricultural Research Service | Wellcome Trust | National Trust for Historic Preservation | National Trust of Australia | Wellcome Trust Sanger Institute | The Prince's Trust | BBC Trust | Swedish University of Agricultural Sciences | Leverhulme Trust | Indian Council of Agricultural Research | Agricultural lime | University of Agricultural Sciences | Durrell Wildlife Conservation Trust | Devon Wildlife Trust | Moorfields Eye Hospital NHS Foundation Trust | Metropolitan Bank and Trust Company | The Royal Marsden NHS Foundation Trust | Terrence Higgins Trust | Saccharine Trust | Prince's Trust | Pilgrim Trust | North Carolina Agricultural and Technical State University | NHS trust | New Zealand Historic Places Trust | National Book Trust | J. Paul Getty Trust | Alabama Agricultural and Mechanical University |
Other roles include Chairman of the Cambridgeshire Farmers Union (1982), Director of the Shuttleworth Trust (1982–1995), Member of the Governing Body of the Institute of Plant Science Research (1984–1989), Director of Strutt and Parker (Farms) Limited (from 1993), and Director of the Lawes Agricultural Trust (from 1996).