Emily usually collapses into a toddler-sized ball of sleep anywhere between 8pm and 9pm.
It was with EXTREME frustration that I was dealing with a ball of energy last night at 10.30pm. I know all too well the perils of doing something during the day which will result in insomnia, lack of sleep, etc. (usually caffeine related) but Em was acting like it was 10.30am, not pm. My overwhelming concern was how were we going to wake her this morning.
Thankfully, by the time I climbed the wooden hill to Bedfordshire around midnight she was fast asleep. Recently fast asleep I don't know. This morning's "wake up Emily" took a bit longer, but it happened and she was her usual morning sprightly self.
The only difference yesterday I can think of is we gave her ice cream for dessert, maybe that's like caffeine to a toddler. Live and learn... live and learn.