Anyway, who says the others were? My airline has avoided the area since this started and I can't believe first world airlines wouldn't have done likewise. ICAO clearly has some questions to answer as well
There's a NY Times link somewhere showing tracks over last week or so. Also the airlines yesterday PM who all suddenly said they'd avoid the area...
If you go to Flight Aware, you can type a Flight # in and get tracks back ~2 weeks. BKK routes to LHR area seem a good starter. You can see BA "looping" around the area, but SQ right through.
Not sure who "your" airline is, but the CAA put out a "UK Operators" NOTAM about avoiding certain FIRs.. so it would take a bit of research to decide which operators were avoiding the area due to their regulators, and which due to their own caution?