AA, now I come to think of it overshot is different from overshoot. The latter implies after a landing attempt whereas the former is 'merely' flying on past your intended point.
We had a Sudanese student who miscalculated his eta at a turning point and overshot be a considerable distance.
In WW2 with very limited nav aids, and more so in a Spitfire, it is quite possible that once lost things just got worse.