My 20 month old has for months and months woken at 5/5.30....because he shares a room, we had to get him up as he was disturbing his sister. Anyway me and dp were going insane with tiredness, so we have moved dd in with us and lo and behold he is sleeping so much better- its made such a difference...but we do have dd in with us which isn't ideal, but blimey we are like a new family. Ds is much happier. Just wanted to share a positive story