Car drop off an hour before at the far end of T5
Through First Wing
Skip the lounge (room with chairs in that serves chain restaurant quality food...)
Pop into Smythson to buy something
Arrive at gate after everyone else has boarded
Door closes behind me
Convenience and predictability are what's important to me. I spend a large part of my working life in nice hotels/restaurants/events so I don't consider any aspect of it to be 'chic'