Re: A&E light switch
The senior consultant I saw walk up to an external door with a prominent bright red sign "emergency exit only - door is alarmed" and push it open to the sound of a very loud buzzer.
To be fair, I heard her on the phone to security shortly afterwards apologising; she'd just arrived back from leave and prior to her going away it had been an allowed easy way out to the car park.. I can only assume that familiarity made her not notice the new signs.