The queues have predominantly affected coach passengers, although I think there were some general queues for all vehicles earlier in the weekend, but it was coaches that continued to be hit hard right through until today.

I am not sure exactly what has changed to cause the kerfuffle at Dover this time. The media appears to be reporting to be some change in procedures for coach passengers where they all have to individually all troop off the coach and present themselves to immigration and get stamped and then troop back onto their coach whereas this previously wasn't the case. But there does seem to be a degree of smoke and mirrors exactly what has really caused the kerfuffle this time.