That encounter led to Greensill being able to meet the chief executives of a number of NHS hospital trusts whose support he was seeking for a scheme to let the NHS’s 1.4m staff in England be paid daily by Greensill, via an app called Earnd, rather than monthly in what Labour said was a latter-day “junk bonds” exercise.
Harding is best known as the boss of the government’s heavily-criticised £37bn test and trace programme.
Calls for clarity about Prior’s involvement with Greensill come amid continuing controversy about the roles played by David Cameron, the former prime minister, who was a lobbyist for and senior figure at the firm, and Matt Hancock, the health secretary, who backed the payments system it wanted to introduce across the health service.