In my experience at Manchester it’s always my wife who gets stopped for the bag open routine while I never do. When this happens I just stand with her but last time I was told I had to “step away for security reasons”. I asked (politely) how far and why and was told if I questioned them again I would be banned from the airport and the police called. So I took three steps back, he said “further” I took another step, he said “further still” I took another. We then had the ludicrous situation whereby he was checking my wife’s bag while all the time looking up to ensure I had not stepped any closer. My wife’s attempt to stifle a laugh did not help his pompous manner. Other passengers were laughing openly.