M/S of aircraft engine revving. In a residential road a woman comes to her upstairs window and looks out before closing it.
At London Airport three scientists talk and make notes. Two more are seen with microphone, telephone and radio equipment. They are a mile from the aircraft and are about to record the sound of it. The BOAC plane is brought close to a massive sound barrier wall (30 foot high) that has been built to cut out the sound of the aeroplanes from the airport disturbing residents nearby.
Barriers are put in place to keep onlookers away from the plane. The plane is anchored in place then revs its engines. Brief shot of scientists recording the sound. View of the sound barrier from the opposite side.
Notes and cutting on file.
Cataloguer's note: this looks like the huge wall seen in the Beatles' Magical Mystery Tour film.