My travel company has telephoned BA to pre-book seats for our trip to Lusaka next June. However they were unable to do this as apparently Lusaka is one of a handful of destinations which are classed as "high risk routes" & pre-booking of seats is not allowed. The agent asked BA what other routes were affected but after waiting 15 minutes for a reply had to hang up.
Can anybody confirm that -
a) The BA agent got this right.
b) what a "high risk route" means.