Complex sentence: The United Kingdom has two Queen Elizabeth class aircraft carriers currently being built and the first is expected to arrive in 2016, they will displace 65,000 metric tons and when built they will be the third largest Supercarrier class in service.
Split into simpler sentences: The United Kingdom has two Queen Elizabeth class aircraft carriers currently being built and the first is expected to arrive in 2016. They will displace 65,000 metric tons and, when built, will be the third largest Supercarrier class in service.