Complex sentence: There were not the customary pre-appointment hearings for either John Griffith-Jones or Martin Wheatley, so that people could not disapprove of these appointments by submitting evidence to these hearings.
Split into simpler sentences: There were not the customary pre-appointment hearings for either John Griffith-Jones or Martin Wheatley. So that people could not disapprove of these appointments by submitting evidence to these hearings.