A few things they mentioned was not to wake them to take them to the toilet as that isn't teaching their brain to recognise when they need to go. The also said not to restrict fluids if anything increase fluids as it might help to strech the bladder.
While I see where this is coming from, my DD has fantastic bladder control and will go for ages during the day without going to the toilet. We've never encouraged her to go unless she needs to. Her problem at night is def related to the fact she just does not wake up, regardless of how full her bladder is (she just wets the bed). I'm a deep sleeper too and seldom wake up (instead I'm busting in the morning). Waking her to try once late at night (so she's been asleep for hours) seems to have worked about 80% of the time.

Onyx - what did the physio do?