Complex sentence: The British battlecruisers turned north, then northeast, to try to rendezvous with the main body of the Grand Fleet, and at 5:40 p.m. opened fire again on their German counterparts.
Split into simpler sentences: The British battlecruisers turned north, then northeast, to try to rendezvous with the main body of the Grand Fleet. At 5:40 p.m. they opened fire again on their German counterparts.