Firstly, I listened to what Len mumbled three or four times (had the show recorded) and it sounded more like "Fudge" than anything else - I was as surprised as the next person when Zoe apologised for him.
Secondly, the main show's live. As far as I'm aware, there's no time delay or editing - I think there's enough proof in the pudding from past shows to back that up - so there's no way a bleeper could be used, there is no 'bleeper man'. Bleeps are put in over the soundtrack in the edit suite once a show is shot or, if there's a time delay, those however many seconds are used to add the bleeps.
Finally, are you known for overreacting? 'Hurts your ears', really? You'd have to listen very hard to be offended.