Coming back from Turkey last year, we had to go through Heathrow. It was one of the very worst travel experiences of my life. We had to walk forever through labyrinthine passages, struggling to find our way. At one point, as we approached a node where we would have to put luggage through, we encountered repeated signs and audio warnings telling us not to yell at or harass the workers, or we would be prosecuted. When we got there, those workers were so rude and unfriendly that I wanted to say "The Hell with it! It's worth going to jail to yell at these jerks!"And BTW, Heathrow sucks too.
This year, we returned through Heathrow, traveling from Prague, and we were prepared for more horrors. As we left the plane and started our travel, we passed a woman carrying a Viking Cruise sign with a list of passengers to meet. We had been on a Viking trip, so we naturally glanced and were surprised to see our names were on it. Once she had gathered everyone, she led us all through those labyrinthine passages and got us to our connection without difficulty. She explained that the sheer, unmitigated Hell of Heathrow Airport was so very famous that Viking had gotten permission to provide that service for its customers, at no extra charge.