George Buchanan’s main claim to fame would probably be his shooting down of the famous Luftwaffe Ace Herman Neuhoff, who confirmed this by signing George’s Log Book in Hospital. One author claims that Neuhoff could understand George because he spoke Afrikaans. On the sad side Herman Neuhoff was responsible for the shooting down and death of Douglas Leggo on 20 March 1942.
Doug Leggo was shot down on the 19th.
RAF 249 Squadron 
Doug Leggo was a very close friend of ‘Johnnie’ Plagis who was extremely upset and deeply saddened by the death of his close friend on 19 March 1942. He swore that he would shoot down 10 German aircraft to even the score, which he did.
I will look into this.
About John Plagis on Wikipedia
https://en.m.wikipedia.org/wiki/John_Plagis
Much more here!
http://www.raf.mod.uk/bbmf/theaircraft/spitfireml214.cfm
Excerpt
Malta Spitfire Ace
Plagis scored the bulk of his wartime victories during the next three months in the savage mass dogfights raging over Malta. In his first combat, only three days after arriving on the Island, Plagis claimed a ‘probable’ against a German Bf109. During the next fortnight he damaged another Bf109 and a Junkers Ju88 bomber.
On 20th March his good friend and fellow Rhodesian, Pilot Officer Doug Leggo, was killed during a dogfight off Malta. Having been hit by fire from a Bf109, Leggo baled out, but a 109 swooped on him and either fired at him or its slipstream collapsed the parachute and Leggo fell to his death. Johnny Plagis was distraught and blamed himself for the death of his friend, as he had tried to persuade him not to fly when he thought that he was not fit to do so. Plagis vowed to “shoot down ten” for Doug, “if it takes me a lifetime.”
On 25th March he claimed his first kill against a Ju87 ‘Stuka’ dive bomber, and also damaged another Ju87. On 1st April, Plagis became the first Spitfire ace on Malta when he destroyed four enemy aircraft in one day (two Ju88s, a Bf109 and a Ju87). On 1st May, Plagis was awarded the Distinguished Flying Cross (DFC) the citation for which stated: “…With complete indifference to the odds against him, he presses home his attacks with skill and courage… He has set an outstanding example.”
Seems a remarkable pilot.