If height is a criterion for a spinner, could Peter Crouch be a better bet?
I may be proved wrong, but I fear that Tom Hartley will have the success of past Lancashire hopefuls Matthew Parkinson and Simon Kerrigan.
Maybe it explains why Alfred Percy 'Tich' Freeman didn't play more Test matches. He played for Kent and, in his first class career as a leg spinner took more wickets than any other bowler ever, other than Wilfred Rhodes who played many more matches. He also took five wickets in an innings and ten wickets in a match on more occasions than anyone else has ever done, and 302 and 298 wickets in two English seasons! He was a relative failure in Tests, though, only achieving ten wickets in a match twice, once at Old Trafford where he had twelve. He also took 10 wickets in an innings on three occasions, two of them against Lancashire with Old Trafford hosting one of them, so he was a precursor to Jim Laker! Just think what he might have achieved with a little more height.
At the time of writing this Alex Hartley is proving rather a better batter than bowler in assisting Ollie Pope to make a game of it.