There have been various guest commentators made up of some of the players playing in the tournament. Joe Perry was doing one match I watched and Ken Doherty was also doing a match. They change all the time. I very much doubt it was Steve Davis. I have never known him work for any channel other than the BBC.
Had a look at the first day's match and wondering what the device was the ref was carrying. Seemed to be clicking it and thought if might have been a timer but no time was showing on the screen.