I should explain at once that I very much regret that it is the Chairman of the Scientific Organising Committee who has been press-ganged by his Committee into giving the concluding remarks at this symposium. I obviously cannot take an unbiassed view of the proceedings. I have therefore refrained from calling this a “survey” or “concluding remarks” - it is a personal view of those aspects of this symposium which have struck me as particularly interesting - I will make no attempt to provide a complete survey of the last five days.