During the Second World War, Malta played an important role for the Allies; being a British colony, situated close to Sicily and the Axis shipping lanes, Malta was bombarded by the Italian and German air forces. Malta was used by the British to launch attacks on the Italian navy and had a submarine base. It was also used as a listening post, intercepting German radio messages including Enigma traffic. The bravery of the Maltese people during the second Siege of Malta moved King George VI to award the George Cross to Malta on a collective basis on 15 April 1942 "to bear witness to a heroism and devotion that will long be famous in history". Some historians argue that the award caused Britain to incur disproportionate losses in defending Malta, as British credibility would have suffered if Malta had surrendered, as British forces in Singapore had done. A depiction of the George Cross now appears in the upper hoist corner of the Flag of Malta and on the country's arms. The collective award remained unique until April 1999, when the Royal Ulster Constabulary became the second recipient of a collective George Cross.