Complex sentence: The squadron was flying patrols and was getting many kills nightly, on one instance W/O W.F. Price and P/O J.G. Costello had shot down two Do.217 aircraft in twenty minutes.
Split into simpler sentences: The squadron was flying patrols and was getting many kills nightly. In one instance W/O W.F. Price and P/O J.G. Costello had shot down two Do.217 aircraft in twenty minutes.