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

Dame Diana Reader-Harris, first woman chairman in background

From left to right Sir William Off; Dr Holland (chairman of council); Mr Runtz; Sir Henry Dale (winner of the 1956 Albert Medal); K????; HRH The Duke of Edinburgh; Earl of Radnor