Complex sentence: The first unit to get the Skua, was 800 Naval Air Squadron in late 1938 at Worth Down, by November the squadron had embarked on and was followed in 1939 by 801 and 803 squadrons.
Split into simpler sentences: The first unit to get the Skua was 800 Naval Air Squadron in late 1938 at Worth Down. By November the squadron had embarked on and was followed in 1939 by 801 and 803 squadrons.