The Post Office inquiry has shed an unflattering light on the inner workings of Whitehall, a hermetically sealed world in which officials purr with reassurance, ministers unquestioningly promulgate their findings to the outside world, and the little people (in this case, innocent sub-postmasters) are fobbed off as know-nothing troublemakers.

Witness after witness has expressed regrets, a sense that something more should have been done

The inquiry is investigating what happened and who is to blame for the Horizon scandal.