Manchester Airport Question

Strange question. Is it possible to leave Manchester T3 after going through security without actually taking your flight.
Someone wants to meet me in the Escspe Lounge at T3. I was think of getting a Ryanair £10 Dublin flight ticket to get through security but not actually take the flight and then leave after my meeting.
Is this possible? I assume so because it would be like missing your flight but I wanted to know for sure.
Someone wants to meet me in the Escspe Lounge at T3. I was think of getting a Ryanair £10 Dublin flight ticket to get through security but not actually take the flight and then leave after my meeting.
Is this possible? I assume so because it would be like missing your flight but I wanted to know for sure.