Complex sentence: In September 2017, he was named in England's Test squad for the 2017--18 Ashes series, and he made his test debut in the second test at Adelaide, which started on 2 December 2017.
Split into simpler sentences: In September 2017, he was named in England's Test squad for the 2017--18 Ashes series. He made his Test debut in the second Test at Adelaide, which started on 2 December 2017.