Lecture delivered by F.L.D. Flintoff, Assistant Public Director of Public Health Engineering at Greater London Council

From left to right, Mr Flintoff, Assistant Director of Public Health Engineering, Greater London Council, Sir Walter Worboys, Chairman of Council, Lord Hayter and Mr G.E. Mercer

Sir Brian Batsford, Chairman of Council on right

On the Princess' right is Mr Herbert Morrison, and on her left Lord Ismay

Commissioned to mark HM The Queen's 50 year association with the RSA

Commissioned to mark HM The Queen's 50 year association with the RSA

Commissioned to mark HM The Queen's 50 year association with the RSA

Commissioned to mark HM The Queen's 50 year association with the RSA

Commissioned to mark HM The Queen's 50 year association with the RSA

Painted by Anna Zinkeisen, RDI; 12,500 sold

HRH The Duke of Edinburgh addressing the Council and Fellows of the RSA in the Great Room on the occasion of the Bicentenary of the House, in the presence of HM The Queen and Sir Brian Batsford, Chairman of Council. 21,000 copies sold

Dame Diana Reader-Harris, first woman chairman in background