It was for Airbus Defence and Space. Very thorough technical interview. Almost 2 hours long. Questions were from the topic of the placement. It was on the telephone, you could use a pen and paper to draw stuff before answering. It was a very good judge of your suitability for the position. The questions used your design skills and understanding of the physics behind beams, joints, stresses, bending. There were some HR type questions and some general computer logic question.