Last year Track woke up at about 6am.
UCAS tell everyone its 8am because they don't want 10,000 logging on earlier in one big hit. But if you are awake earlier its worth checking. Just don't keep hitting refresh endlessly if it isnt - this just slows the entire system, and makes you more anxious. If it isnt open or your decision isnt here yet, go back 30 mins later to check. And once you have your decision and all is well, stay off Track.
Good luck everyone!