going slightly off topic but this gives an indication of how many cruise passengers come into dover to visit the castle. i must add that i had got off a stagecoach bus with about another 20 german speakers plus many others take a cab up there.
i shudder to think how long it took them all to get in, on sunday i had 2 people in front of me in the queue and had to wait 20 minutes.
english heritage staff(the few that are left) try to squeeze every last penny out of people before they let them in.