All of a sudden, ds2 has started leaking his nappies. I have started changing him again in the night but often it still happens. And it's a BIG leak, almost like he's peed out of the leg hole. He's wearing the right size, I've gone up a size and tried a different brand and still it happens. He (and ds1 when he wore them) have always been fine with Sainsbury nappies, they're a really good fit. I used to use pampers pants overnight for ds1 and that worked well, tried that with ds2, no difference
Any suggestions?