3-year old DS has been swimming in a pre level one swimming class for about 5 weeks. Parents have always sat on a little bench nearby and helped out kids as required. All very nice and DS really enjoys it. Tonight a pool attendant asked all parents to move to the balcony which is a 2-min walk away back through the building, I didn't feel happy. Sat on the balcony and waved at kids (who were then confused and spent rest of lesson looking for parents on balcony). I then had to watch helpless from balcony as my DS wondered off by himself in the water (no armbands) as the teacher had her back to him sorting out another child. Can't blame the teacher these are 3 yr olds after all. I just had to hope that someone would notice in good time if he slipped and went underwater as there was no way I could have helped him. AIBU to request to speak to the manager about this?