It will depend on size of crowd building at ques.If huge crowd is at several ques they may open a little early not 7:30 though.The bakery has been open in past and you can smell those wonderful rolls from the train station.I have been let in 20 minutes early to MK when gates were to open at 8 AM.
EE usually opens exactly one hour prior to the official opening of the park. If it does open early, it will only be to relax crowd conditions at the turnstiles, and the attractions will still not open until 8 am. Doesn't hurt to be early, though!