Sounds like we had the same problem when Rebekah was still in night nappies. We had a problem with the leg gape in WNNN too
I got XL LLS SW & that was brill. It wasn't even damp on the outside after only one prewash! Typical theat she decided not to wear NN anymore after only wearing it twice
Puddlekins night nappies are good although ours wouldn't have fit Rebekah for long. Emma was going to have a play with making some extenders but then R pt so not needed.