De Valera , Churchill ' s Guest British Prime Minister Sir Winston Churchill ( left ) shakes hands with the Irish Premier Mr Eamon de Valera after the latter had lunched with him at 10 Downing Street . Mr de Valera is making a short visit to London . On the right is Mr Frank Aiken , Eire ' s Minister for External Affairs , and ( background right , wearing glasses ) Mr F H Boland , Eire ' s Ambassador to London 16 September 1953