Originally Posted by desiman

There is an issue when booking flights to Islamabad ie. LHR-ISB or LHR-ISB-LHR. An error message is displayed "Error There was a problem with your request, please try again later."

The error appears immediately when going through "Book with Avios" and adding route, date and passengers. The error also appears when going via BA's Reward Flight Finder and then picking dates where there is availability.

Curiously, there is no error when booking the other direction ie. ISB-LHR or ISB-LHR-ISB.