Complex sentence: It was due to run for 30 minutes but was delayed by a light rain shower that hit the area in the early morning and the session was prematurely ended when Barron drove into pit road while a large amount of fluid coming out from his car.
Split into simpler sentences: It was due to run for 30 minutes but was first delayed by a light rain shower that hit the area in the early morning. Then the session was prematurely ended when Barron drove into pit road with a large amount of fluid coming out from his car.