With a question like this, the team at Heathrow Airport is looking to hear your preferred style of working through your duties on the job. Knowing that working for one of the busiest international airports in the world can come with lots of unexpected things outside of your daily duties, your interviewer will want to hear that you are able to handle all of the aspects of the job you are being considered for. As you answer, make sure that you discuss the importance of both the regular job duties you will hold and the other outside duties that will inevitably come your way.