best disposable night time nappy for 3 year old?

[pillsthrillsandbellyaches]

3 year old with asd (so god only knows when/if he will be dry at night). about
2 1/2 stone. currently using huggies size 6 and gets changed once when we go to bed (about 1030), but still wet in morning.

any tips? any super nappies?
i have the crappy free ones from the nhs, obviously we dont use them at night! (and in response to another thread, you only get 4 here too)
what do other people use?

I have a 6 year old with ASD and I use Dry Nites pyjama pants, they are expensive as they cost 50p each and do sometimes leak. DD will not use ordinary "nappies" as they are for babies, so NHS ones no good as she will only wear the pull-up style.

My son(asd) is much older ( so in a different size/brand) but I add a boots booster nappy pad. However this may spoil the fit around the leg on a smaller child.

Dd2 wears Huggies little walkers (size 6), she's almost 4 and pee's a lot. These are the only ones that fit and dont leek.

I find sains pull ups are quite absorbent for my 4 yo. Dry nites leaked for us.

Thankfully my sn ds did actually toilet train fairly early but my NT dt1 is still sopping every ngiht at 4.5!