I am currently reading "On Eagles' Wings" from Ezer Weizman, who was IAF Commander and later the 7th President of Israel. He talks about his early training with the RAF in 1944 and early in 1945, informing that the standard was indeed raised up, as well as the amount of flying hours.
https://www.abebooks.com/servlet/Boo...-srp0-_-image3
There are dozens of other books that give you a glimpse of the training both in the RAF as well as on the Luftwaffe.