The preview loop has been in place since about 10:30am. All traces of Universal TV have now been removed.
Preview loop was there at 8:30
Odd, Universal TV HD was still on the SkyQ EPG
until about 10:30, showing the ceased broadcasting caption.
It wasn't a straight switch between Universal TV and Sky Comedy, i.e. Sky Comedy isn't using the same transponder, so Sky had to 'redirect' channel 113 to point to Sky Comedy's transponder. It seems from comments that this switch took place at different times on the different incarnations of Sky's EPG.