They are not related to the Old Bailey in any way.
Unfortunately they don't appear to have a tour running on the 6th. the closest ones are the 4th and 10th.
You can still go inside and have a look around though. members of the public are allowed to sit inside most of the courts
26 Jun 18, 16:57
I realize it may end up 'self-guided' but that will work. I have heard two cell phone rules: 1. cannot take them into courthouse, but you can leave with nearby commercial establishments (?) and 2. Turn them completely off when you enter the building. Wondering which applies and any suggestions on finding a commercial establishment to safely leave my cell?
26 Jun 18, 19:10
you can't take any bags inside the old bailey and you can't take your mobile phone inside either. turning it off isn't enough — they won't let you past security with it. (the old bailey is where they hear all the big terrorist cases, and they regard it as a security risk)
people usually suggest asking at a local cafe or the pub down the road, but if you want a proper, secure place to leave it then try one of these shops: https://www.luggagehero.com/london/ it's cheap enough, and they've got one near Blackfriars Bridge