Thanks for all the comments
She is a good little sleeper - generally I feed/change her and she doesn't really even wake up. Tonight I tried my MM squares (they're the 100wt ones - I also had microfleece from spotlight, but found the MM better) - didn't help, as her nappies were soaked at 12am, and at 3am (i.e. now). I put a three layer bamboo booster (like the ones inside the BBB) on the outside of nappy in between wool cover - the front half of it was soaked too. Am going to try a prefold inside a bigger pul cover next change....
I had thought of 'bed prepping' and when I was trying the BG2 on her at night I had her on a piece of thick wool blanket - but the thing is, the BB wool cover NEVER leaks - that is not my problem. I have given my friend the heads up about a large cover - and if she doesn't have a wool one spare I have some bigger BB pul ones that I hadn't thought of using.
I'm just wondering whether BBB are just not cutting it for us as a night nappy? I'll have to see how the Wild Child goes - of course I'm not really sure I understand about these more expensive special night nappies - they're not supposed to make it through the night in just one, are they? And therefore, if you need more than one, it gets very pricey!
Haven't experimented with the flongies/longies option. I have some reservations about wool on her skin, because I have eczema and can't wear wool - but I suppose trying it for a night wouldn't hurt. You're right, bilbylove, exhausted and frustrated! Especially since I know she would probably sleep longer if she didn't feel wet!! Those liners are great, but just can't stand up to the flood beneath them!
YAWN!!