Air War
German bombers raid Scapa Flow (night April 22-23).
Home Fronts
Australia: Prime Minister Menzies threatens to re-open coal mines by force if miners do not end their 6-week strike (strike settled by arbitration May 15).
Britain: Second War Budget presented by Chancellor of the Exchequer, Sir John Simon: income tax raised to 7s 6d in the £; higher duties on beer, spirits and tobacco; increased postal charges; planned introduction of a new Purchase Tax.