Original sentence: Having inserted this scene, the film doesn't go on to mention that shortly following the end of the Battle, both Dowding and Park were forced out of command by Leigh-Mallory, despite their having proved that Leigh-Mallory's theories were unworkable
Edited sentence: Oddly, having inserted this scene, film doesn't go on to mention that, shortly following the end of the Battle, both Dowding and Park were forced out of command due to political chicanery by Leigh-Mallory, despite having proved that Leigh-Mallory's theories were unworkable