Hi,
No suggestions on the routine as I will leave that to someone who can best advise, but I have a 22 month old and when she wakes up for that amount of time in the night, I definitely think it is due to her teeth. We have had these occasional 1-2 hour NWs for months although usually no more than 1-2 nights every couple of weeks and then a tooth normally appears. So it could be that? What do you think?
Good luck anyway x