If you are flying with Qatar Airways from (or possibly transitting through) Heathrow, I recommend you speak to QA as a matter of urgency. I am due to fly to Namibia on Saturday and phoned QA to check everything was in order yesterday. I was told they are no longer able to accept firearms at Heathrow. This is despite me completing and returning QA's documents to export a rifle and ammunition several weeks ago, and receipt being acknowledged at that time. I have planned and saved for this trip for several years and it is a very big blow that I can not take my own rifle.