Letter from Howard Walter Florey to Mr Haylor, Secretary, SAC, Ministry of Supply, High Holborn, London Has no objection in principle to completing form for security clearance - says he fells, like Sir Paul Fildes, that he has received these documents for so long and that he will soon have to retire from such committees, that it is not worth while proceeding with the matter proposed - is prepared to resign at once from the committees receiving top secret documents. 27 April 1957