When I saw Mogg randomly last night I thought he either looks incredibly jaded after waiting all that time or he was scared s-less of being seen on camera having queue jumped. Turns out it was the latter, i.e. upper class privilege and entitlement.
I see they have gone from allowing one person each side to stop and have a moment, bow, etc., so having two rows each side and people being ushered on after taking a few more seconds.
In reality, unless you're going to screen out tourists/foreign nationals somehow, they should have added airport style conveyer belts and/or a series of ramps to allow multiple lines of people through. It's a massive industrial operation and loads of people are going to be left disappointed for not getting access.