DS can go to bed at 7pm, wake at 7am and not pee til after 9am!
Yes, my daughter is the same! She can do her last wee at say, 5pm, then not wee again before bedtime - and still wakes up the next morning with a dry nappy - AND then not wee until 2 hours after that!! This morning was the longest - 3 hours after waking up...

So you guys don't think it's a problem?? I really don't want it to be a problem, but I wasn't sure if she needed to see a doctor.
When she has a lot to drink in one go - like 200mls+ at once, then she does go more often.