I'm beginning to think I dreamt this, but (was it on BBLB?) before we met the HMs didn't Dermot walk along that line of poles with the HM profiles on and interview friends/family and his wife/girlfriend spoke about him? They were all asked to tell us one thing about the HMs and they also mentioned how they were related to the HM.
I thought I also heard him saying, in his intro bit, something about his missus?
I am intrigued to know whether he has ever mentioned either of them inside the house.