In that interview from today Mark was quoted saying that it was about a brexit man... A man who cannot deal with change, with modern times, paying no longer with cash etc..
So it's just a man maybe talking to someone, who is not important, friend, wife, colleague, random person, justifying himself and complaining .. and he waits for the waiter (waitress) to deliver his bacon order .. and asks during he tells his story when the waitress comes along ... therefore the 'xcuse me...so the chorus interrupts the story and shows at the same time what kind of guy he is to order something so out-of-date ...
The waitress maybe has no such things as old fashioned bacon rolls anymore and suggests a toastie instead... and in the question about which sauce, brown or red, the decision is reflected... the Brexit .
It's just that Mark never uses a single word randomly.
LE