Complex sentence: The clearer skies revealed a Blohm & Voss BV 138 flying boat shadowing the convoy and four Hurricanes took off to intercept it but could not find it in the clouds.
Split into simpler sentences: The clearer skies revealed a Blohm & Voss BV 138 flying boat shadowing the convoy. Four Hurricanes took off to intercept it but could not find it in the clouds.