Probably just down to the change of environment. I’d just keep at it, the same thing you did at the start do again, he’ll soon remember. We also use nappies for all sleep, naps & bedtime as that comes way later.
@Emma thank you, will do. I am trying but I feel like we had come so far and now it’s back to square one.
It does happen. My boy had been potty trained since July and he has regressed. However I just need to go back to basics and remind him that poo and pee goes in the toilet with books, reminders etc. hopefully it doesn’t last long.