Never been one to kick someone when they are down.....However, one of the most frustrating things I have found with BFPO (other than the stuff taking ages to arrive) is the fact that they will not accept parcels (or letters I assume) that have been ordered from internet sales companies that use couriers that are not on the approved BFPO list. So lets say you order something from sparkies electrical stuff.com and they use a local courier 'smiffies deliveries' - because smiffies deliveries does not have an agreement with BFPO they will refuse to accept it.
When I enquired (repeatedly) as to why a parcel of mine had been returned to sender I finally got the answer that as the courier firm did not have a revenue sharing agreement with BFPO then BFPO refused to accept the parcel. So BFPO seems more interested in revenue generation than supporting froint line - QED.