I read a tale somewhere, may very well have been on Pprune. Polish bomber pilot in the RAF who had a complaint made to the CO by his crew that his piloting skills were not what they thought acceptable. CO flew with the gentleman and observed that the crew's concerns were valid. Asking the Pole about his background and training he replied "I trained as a navigator, not a pilot". Well done that man, if true it makes for a good story about the heroism of the Poles.