Replies already listed are correct. No public Gyms at level 3.
Even at level 2, it will be interesting to see if small groups are allowed to start coming together whilst physical distancing is in place … watch this space!
In the interim a couple of good innovations for social fitness networks have been taking place to bring together virtual communities:
Running groups using Strava
Cycling groups using apps like Zwift
If you are looking to write training programs, check out: Visual Coaching Pro (very comprehensive and my preference) or if its more for multi sport athletes and weekend warriors, then you may find Training Peaks is enough to get you going remotely.
Cheers JT