A bit of background.
My 3.8 yr old had been dry at night since around 18mths (daytime was a very different matter). We used bedtime pull ups until around 6mths ago.
She started school nursery in Sept and we had a few bed wetting instances., so back into bedtime pull ups, however she's had no wet pull ups!
Last night we decided to try running free again (pull ups make her genitals sore because of the heat/sweat etc) but, by 11pm she'd wet the bed.
So I've been reading and one comment I read on here talked about about an appropriate age to be wearing pull ups in bed but didn't elaborate.