The main advantage that Britain had during the battle of Britain was radar. This meant that the British air force had adequate warning as to when the Germans were going to attack. Radar stations made it possible to track German planes from when they left their bases. What this meant for the RAF was that they could tell how many planes were coming so they could send just the right amount to deal with the threat. Also it meant that the pilots didnt have to be up in the sky all the time wasting fuel. Also if the pilots had to be up in the sky's all the time they would have got very tired. However with it this way they could sleep then be woken up when they knew the Germans were coming. Source E mentions the advantage the RAF had over the luftwaffe due to radar. "The positions, directions and numbers of enemy planes were tracked by radar and the information was passed on to the operations controller... From here, controllers directed the fighter squadrons to attack enemy planes on target, and then guided them safely back to base"
The British also had another key advantage they were fighting over their own territory. This would generally make the British pilots fight better because they are fighting for their own country. Also if any British pilots were shot down and the pilots got out safely they could be sent back into combat, however if the Germans were shot down they would be taken as POW's and couldn's be sent back up into combat. From source J i also know that German fighter planes could only spend 30 minutes over England and 10 minutes over London or they would run out of fuel. Therefore they couldn't really protect the bombers for long enough.
One thing that is definantly a myth in the battle of britain is the spitfires god like status compared to the ME-109. The Spitfires and Me-109's were very similar on abality the main diffrence is that the spitfire's engine occasionally cut out when it went into dives. One weakness of the German airforce was the fact that it had no heavy bombers. This was a huge weakness.
In source G it says that the RAF pilots lacked experiance, was short of aircraft and had problems with time and equipment:" The training units have no trained pilots ready, so we shall have to train these two ourselves..." As we are already short of aircraft.In fact, we have to strip parts from wrecked planes in order to repair planes that can still fly. This is the observation of an RAF squadron leader, now i can't see a reason for him to have a biased point of view but all i can say is that this was not the case all over Britain.
Source H however glorifies the RAF "Most of these raiders that were not destroyed were harassed all the way back to France... Hitler's invasion fleet in the channel ports has now been destroyed by the RAF... our bombers gave the invasion ports their most severe battering to date" The source is the Daily Mail Newspaper, which is descricing the success of the RAF on the previous day. This is definantly propaganda in order to improve morale on the home front.
Overall i don't disagree with the interpretaion but i think that Germany's defeat in the battle of Britain was not only due to the luftwaffe's inadequacies and its commanders mistakes but also due to other things such as radar and the fact that they were fighting over Britain.