I started a thread the other day about 10 month old DD suddenly waking at night.
I've been keeping a mental diary the last few days and it seems to be that if she has an early tea (about 4.45pm) of just a sandwich and maybe a small piece of fruit (so all over by 5.15ish) then she seems to sleep through okay whereas if she has a later tea at about 5.15 of something more substantial like pasta and veggies and so doesn't finish until about 5.45pm then she wakes up. Her bathtime and milk routine is always the same although maybe if she has a later tea it might run about 15 mins later or so but nothing major.
Could this possibly be having some impact do you think or is it just a huge coincidence?