Have you any clue? The comment "The Spitfire, one of the few aircraft used in the Battle of Britian that were actually produced by the British" There only were two aircraft involved in the BOB and it was the spitfire and hurricane! Both produced by britain. The hurricane accounted for a lot more german aircraft shot down during this time. The mustang was ordered by britain in 1942 two years after the Battle of britain due to a fear that aircraft could not be produced in great enough numbers. The later marks of spitfire outclassed the early mustangs so only a few were ever used. The early mustang suffered from having the american allison engine which was replaced by a british Rolls Royce merlin engine (Used in the spitfire and hurricane) that set the performance standard. The latter Griffin engine 10 litres more than the merlin set the spitfire way out in front of anything the US could produce! Get your facts right!