My DS is 2.5yrs old and is nearly TT overnight.

He is fully TT of a day and now I have noticed his nappies arent wet of a night so I will be letting him sleep without them in the next week or so and see what happens.

I think you are meant to reduce fluids before bed... make sure they use the toilet before bed and then once you start to get dry nappies or pull ups then they are ready, Letting them get "wet" doesnt really teach them anything .. Maybe no drinks after dinner?

BEst of luck anyway