Smiling Knight in a Garter With a warm characteristic smile , British Prime Minister Sir Winston Churchill rewards the waiting crowds in Downing Street with this glimpse of himself and Lady Churchill in the open doorway of No 10 Downing Street . Sir Winston is seen in the full court dress , with knee breeches and garter sash and garter emblems at waist and knee in which he recieved the Queen and the Duke of Edinburgh , when they dined at No 10 Downing Street tonight . This is expected to be Churchill 's last great social occasion at No 10 because it is understood that he will tender his resignation as Prime Minister tomorrow . It is believed Sir Anthony Eden , British Foreign Minister , will be invited to head a new Goverment as Prime Minister 4th April 1955