John Sales - recently retired head of gardens for the National Trust
Michael and Beverley Lear - plant specialists working in historic planting schemes, new landscapes and masterplanning
Dr Hilary Taylor and Peter Vickers - experts in the layout, design and maintenance of urban parks, squares and open spaces
John Phibbs - an expert on the history and layout of eighteenth-century parks, particularly those of 'Capability' Brown and Humphry Repton
David Lambert - adviser to the Heritage Lottery Fund on urban parks, and conservation officer at the Garden History Society
Ted Fawcett - experienced in garden restoration, marketing and public access
Mark Lutyens - a landscape architect who has designed the landscape for the head office of Boots
Other advisers are in the fields of architecture, agriculture, archaeology, botany, ecology, forestry, specific garden types, river management, lakes, conservation, surveying, planning, events, project monitoring, management and grant programmes.