Ok, this sounds a little like a BIG inconvenience, but you could try taking the night diaper off completely for about 2-3 nights or just gradually phasing it out. The theory is that your child will wake up from the pee and be uncomfortable doing that in the bed and will get out of the habit if they no there will be no more diapers to catch it at night. I would prep the bed before hand if you try this. Just an idea.
Thanks for that tip on toddler night toileting!
Just today, she woke mid-way through a diaper-free nap to visit the toilet down the hall, then returned back to bed to sleep! So maybe one of these nights we'll attempt your solution...
After posting my query here, I had a notion that disposable pull-ups might serve for night-times. Are they as absorbent? Anyone tried 'em?