Complex sentence: In 1910, the business, together with the Royal Aero Club, moved to larger premises at Eastchurch, about 4 km away, where the Short-Dunne 5, designed by John W. Dunne, was built, the first tailless aircraft to fly.
Split into simpler sentences: In 1910, the business, together with the Royal Aero Club, moved to larger premises at Eastchurch, about 4 km away. Here the Short-Dunne 5, designed by John W. Dunne, was built; this was the first tailless aircraft to fly.