Potty training perfect while naked

[justme2021]

So I have been potty training my child for about. Week now they've been perfect no accidents except once, they needed a poo and diddnt make it in time, no problem.
But the problem is they're due to go back to nursery tomorrow and me back to work so I decided today we'd try pants as they've been bare bum so I put them on explained and shown how to pull down pants even got them to do it, I left the room to make breakfast and they shouted mummy wet wet. They done a wee in there pants, so we brushed it off said it was okay sat them on the toilet put a new pair on and five minutes later another accident,
I feel they're mistaking the pants for a nappy but how do I stop That as I don't want them having to many accidents in nursery or they get scared to pee etc

Forgot to add they're nearly 3

Will nursery allow you to send them in commando? We did this with DS and it worked well, just bought a load of leggings in a size up so they were loose so felt similar to being bottomless. If commando isn't an option then get maybe some pants in a larger size.

You need a stint in baggy/loose trousers or shorts before adding in pants ideally as they can get the hang of pulling up/down without feeling too much like a nappy

As pps have said, bare bum to pants and trousers will be tough. We did it as three stages and actually stayed without pants under loose trousers for 7 weeks or so. Would have been less but we had a week away and that was a write off so we had to do a reset. Once we introduced pants it was no issue at all. Nursery should be fine with it as trousers will still contain anything as much as pants would.