Complex sentence: Race was scheduled at 2am on the 12th of June on BT Sport ESPN, it was postponed to 7pm that day on BT Sport 2 due to rain but further rain caused the race to be postponed to August 28th.
Split into simpler sentences: Race was scheduled at 2am on the 12th of June on BT Sport ESPN, it was postponed to 7pm that day on BT Sport 2 due to rain. Further rain caused the race to be postponed to August 28th.