Complex sentence: Instead, it was sold to Wing Commander Ronald Gustave Kellett and flown by No.615 Squadron RAF until 1949-it was given the civilian registration G-AIZG and was used by squadron members for recreation.
Split into simpler sentences: Instead, it was sold to Wing Commander Ronald Gustave Kellett. It was it was given the civilian registration G-AIZG and flown until 1949 by members of No.615 Squadron RAF for recreation.