If rD had any sense, which we all know they don't, they'd 1) announce stuff like this and the ending of deferrals and all the other changes they make, and 2) provide a clear and sensible explanation for why the changes were made. It wouldn't take much to send out an email, post on Twitter and Facebook, and provide an update on their web site saying "Dear race participants, while we know running through the castle in MK is a highlight of the course for many of you, the course during the half will no longer do so. This is being done for safety and logistical reasons, as the large backups and masses of runners trying to get through a narrow opening greatly increased the risk of injury to the runners."