While operating her experimental radar Lady Valerie Stanford (Karen Steele) states four RAF bomber squadrons are on a "South by Southwest" course at a range of 800 kilometers (480 miles) away. Using a reverse azimuth of northeast from near Hamburg where the air defense batteries were located, would put the squadrons somewhere over the Baltic Sea near Stockholm, Sweden.
RAF Air Marshal Woodhouse wears the rank markings of an Air Chief Marshal.
When Kinch is getting away from the radar truck, the sun is setting/rising, casting shadows, and the camerman's shadow can be seen in the corner of the steps.