According to Wikipedia, which is backed up by a text source that I do not have access to, after the death of Italo Balbo a British bomber dropped a wreath on top of the runway where he was shot down by friendly fire. Why would the British do this to a country they were at war with, offering condolences to a fascist, while risking people to do that!
Balbo was a famous aviator in the inter-war period, particularly known for massed flights culminating in a transatlantic armada of 24 aircraft flying from Rome to Chicago in 1933. Large formations of aircraft became known as a 'Balbo', the term being used (unofficially) by the RAF during the Second World War and still used these days at air shows. Just before the transatlantic flight Balbo had hosted a visit from Phillip Sassoon, British Under-Secretary of State for Air, accompanied by Arthur Longmore of the RAF. As international relations deteriorated in the lead up to the Secord World War Balbo, something of a Germanophobe, was critical of the German-Italian alliance; hosting Goering on a visit to Libya in April 1939 Balbo deliberately invited Jews to a formal dinner, included a visit to a synagogue on a tour of Tripoli, and finally, after Goering expressed his wishes to buy a statue he saw, Balbo took the statue for his own office and despatched a replica made by a Jewish artisan to Berlin.
When Balbo's aircraft was shot down by friendly fire in June 1940 Longmore was an Air Chief Marshal holding the post of Air Officer Commanding Middle East; Longmore ordered Air Commodore Raymond Collishaw to despatch the wreath. Both Longmore and Collishaw were pilots during the First World War, when the dropping of messages and wreaths for opponents was a more common occurrence. Longmore later wrote "This Italian was an international figure in the aviation world, known to many British air-travellers; as a mark of respect I had a suitably worded note dropped over the frontier by an aircraft on reconnaissance. [...] I am fairly certain that he did not relish the idea of fighting the British but he was no longer a close associate of Mussolini and probably had no influence with him."
Whilst probably not a specific motive of Longmore, Allied press did make the most of the incident, highlighting Balbo's views and speculating that it may have not been an accident but deliberate murder (e.g. BALBO MURDER THEORY from the Brisbane Courier-Mail). It does seem to have been an accident, though.