LONDON — When Andy Byford ran New York City’s dilapidated subway system, fed-up New Yorkers hailed his crusade to make the trains run with fewer delays and lamented his premature exit after clashes with the governor at the time, Andrew M. Cuomo. He was a familiar, unfailingly cheerful presence on its often-restive platforms. Straphangers even took to calling him “Train Daddy.”
Nobody calls Mr. Byford Train Daddy in London, where he resurfaced in May 2020 as the commissioner of the…
