To establish what proportion of elderly people in Britain: i) experience low day and/or night-time indoor temperatures ii) experience low core body temperatures iii) feel cold at home during the winter. Also to establish factors associated with body and room temperatures/thermal experience, and to compare the results with those obtained in a similar study undertaken in 1972. Body and room temperatures; thermal perception; type/use of heating; use of heating controls; paying for fuel; cold-related behaviour; home insulation. Measurement Scales Used For details of measurement scales used and questions derived from other surveys see the documentation that accompanies this dataset.