Personally, if I were the boss of Sky, I would sack the person who recorded this private conversation and made it public. If people were sacked for their private views, the country would grind to a halt ( how many people have referred to their boss, in private, as an idiot ?).
I would like to know what the agenda is of the person who did the recording. Does he/she have a grudge ? How long has he/she been making recodrdings to find something to 'use' ?
I find it regrettable that Sky has made the presenters apologise for comments, that were not made on air, in order to mollify a vociferous section of the community. The person who has put Sky in this position is the 'whistleblower' and, as this person is obviously not a team player, this is the person I would sack.