Complex sentence: By 1968 the growth in aviation necessitated a move to the disused RAF Duxford in the mid 1970s Duxford became part of the Imperial War Museum and the club moved again to Gransden Lodge Airfield.
Split into simpler sentences: By 1968 the growth in aviation necessitated a move to the disused RAF Duxford. In the mid 1970s Duxford became part of the Imperial War Museum and the club moved again to Gransden Lodge Airfield.