This hearse is a "Blocker" . . . Used as a spare on a huge occasion such as this, but in blocking role it's used to pull out and stop traffic flow which then allows the others to pull out. The hearses used are "BINZ" coachbuilt Mercedes hearses supplied by funeral companies owned by Dignity plc. Hence the reason why the all match. It also explains why 10 identical hearses can be provided with short notice.