I’ve just been for a swim at my gym. Members can usually bring their children for lessons and at weekends, but I think it’s allowed all day at the moment as it’s school holidays.
For most of the time today, it was only me and two children (probably aged around six to eight) in the pool, with what I presume was their dad watching from the side. At one point he suddenly got up and went out into the reception area. He reappeared quickly enough, but it seemed a bit of an odd thing to do, as the pool is unsupervised - the only adult there was me. Then a few minutes later he did it again, and this time was gone for longer. He just seemed to be chatting in reception! (The door has a glass panel, which is how I could tell - but he had his back to it, so he couldn’t say he was keeping an eye on the children through the door.)
When he did reappear I was going to say something, but the children got out at that point and he took them off to change. Also another dad had arrived with his kids at this point, so perhaps Dad One had seen him come and thought ‘Well, there’s two adults there’.
The rule is that under 15s must be supervised. I couldn’t get steamed up about two 14 year-olds without parents, but under tens is a different matter. AIBU in thinking that adult supervision means a parent or guardian (or at least a lifeguard or instructor) - not just ‘there’s a woman swimming; therefore I can just wander off’?