How early do we potty train?

Personally I think 1 is quite early, they need to be able to recognise they “need to go”. However every child is different, if she is able to communicate her need to go, is showing she is aware when her nappy is wet/soiled and able to pull her own trousers up/down independently. Then I’d say it would be worth trying.

I think the new guidance is that you can introduce a potty as young as 6m or they are confidently sitting. This is like placing them on the potty after a bath or before bed ect when they normally go to get them used to the concept of going on the potty. There's no harm in getting her used to it if that's what you want to do and you feel she is ready. Although proper potty training isn't normally done until around 2y.

You can absolutely start that early - my daughter started causally from around 20 months but I easily could have started from earlier. She was day trained for several months before she was confident at pulling her own trousers up and down independently.
Maybe just have a potty out, start having lots of conversations about it, move it from room to room, encourage sitting on it, and see if there’s a certain time you know they pee. Ours was the second her toes hit water in a bath, so we dipped them in and then sat her back down on it, caught the first wee and made a huge deal of it, praise clapping cheering etc.
Depending on the nursery they should support you but if she’s not in a toddler room they may not be able to support as well. Worth a chat to see what their policies are.

When they’re ready. You cannot force a child to potty train, it won’t go well trust me.
I’ve been working with children for 18 years and some are ready at 18 months, others not until almost 4!
Introduce a potty at bath time to sit on and go from there

My son was out of nappies at 17m, so you could absolutely give it a go ☺️ when they are younger it’s easier to get poos on the potty first (as you can usually learn their “I’m about to poo” face!) and then wees come gradually. If they can’t talk yet you can teach them the sign for potty, that was helpful in letting my young baby tell me they needed to go 👍🏼 good luck! Happy to give more tips if you like 💚

Starting mine next month, she'll be 11 months