1. The National Trust is the largest conservation charity in Europe. It was founded in 1895 to preserve places of historic interest or natural beauty in England, Wales and Northern Ireland. Participants in the research presented in this paper have included the National Trust's Conservation Section at its London head office, its Estates Department in the Wessex Region, Cliveden Conservation Workshop and, latterly, the Centre for Heritage Buildings at BRE.
2. English Heritage is the statutory government authority for the preservation of cultural heritage in England. On its mortar research, see Teutonico, J.M., McCaig I., Burns, C. and Ashurst, J. ‘The Smeaton Project: Factors Affecting the Properties of Lime-based Mortars’,A Future for the Past. A Joint Conference of English Heritage and the Cathedral Architects Association, 25–26 March 1994, James &James, London (1996), pp. 13–22.
3. In chemical terminology, this is high-calcium lime, but commonly known by practitioners in the United Kingdom as putty lime because of its use in putty form.