It seems that Julian Knight MP, the (Conservative) chair of the Digital, Culture, Media and Sport Committee wrote to Oliver Dowden (subsequently reshuffled) effectively opposing the appointment of Paul Dacre as chair of Ofcom.
“…the industry standard for rerunning a recruitment campaign would note that candidates previously deemed to be unappointable should not re-apply. We would expect that this campaign should contain a similar rubric.”
(Thanks to Carole Tongue for the tip)