Let’s say you arrive at 8:55 PM on a Monday. The doors are still open. You have exactly five minutes to run in, grab a £6 bag of posh coffee, and sprint to the till. The staff will smile, but you’ll see the “please leave” energy beaming from their eyes like a laser. You can do it. I believe in you.
But if you roll up at 9:01 PM? The doors have locked. The lights are dimming. The staff are already halfway to the pub. Do not bother knocking. I’ve seen them ignore even the most dramatic knock. They act like they genuinely cannot hear you. It’s a skill.