74's Lightning stream take off was certainly performed at the SBAC show in September '61. I can confirm that event as it was my first Farnborough; albeit as a young spectator on that occasion. Coincidentally the Napier de-icing research Lincoln was also there in the static park. However, I don't think this was the time the Lincoln in the movie was imaged, since 'PRJ then had the wing section mounted up on the fuselage.