My dd is not genuinely night trained. By that I mean sometimes she will be dry but if she needs to pee during the night she won't wake up.

Still fairly normal at this age apparently.

My friend had great success with a monitor/alarm thing that you slip down their undies/pull ups. It beeps when it gets wet so the child hears it and goes to the loo. After a couple of weeks they can recognize the signs themselves and dont need it any more.

Might look into that soon as I don't want dd to have to knock back sleepovers with school buddies.