England have had a long-standing issue with spin in Test match cricket dating back to Graeme Swann's retirement midway through the 2013-14 Ashes series.
Moeen Ali did an admirable job as Swann's initial long-term replacement, taking 195 wickets at 36.66 before retiring last summer. However, he was predominantly a batting all-rounder when he debuted and was selected after scoring 1375 runs for Worcestershire in the 2013 County Championship.
Aside from Moeen, who played a total of 64 Test matches before retiring from the format last year, Jack Leach has been England's most capped spinner since Swann. The 30-year-old has played 22 Tests and picked up 79 wickets at 31.88.
