We potty trained our nearly 3 year old over Christmas - we did it over 2.5 weeks and by day 4 he had understood he needed to wee in the potty (poos a bit hit and miss but by the end of the 2.5 weeks he had done a few poos in the potty so we were feeling confident). We had even been on a few 1-3 hour outings and used the potty when out and about. He’s started back at nursery after the break - he goes 3 days a week. First week lots of accidents but had been using the potty with them. It’s now week 2 of nursery, day 5 in total without a nappy at nursery and they put him in a nappy early morning because apparently he was refusing to go on the potty / didn’t say when he needed to go and wet himself several times. He’s spent basically the whole day in a nappy, I feel like all our work has been undone. Can someone advise if this is normal? Or if I need to have a strong word with the nursery? I understand they have lots of children to look after and can’t take him to the potty every hour but it seems a shame when he was doing so well?