I have an early flight from Stansted. I know that security gates close around midnight and reopen around 2.30am (or similary, I cannot remember exactly).
Right after security there are several comfy chairs one can sleep into which become available after security reopens.
My question: if I manage to pass security before they close the gates will I be able to sleep on the other side or I will be asked to wait outside of the security check.
If the question is too narrow, I welcome considerations on general airport practices on the subject.