I'm voting for losing the tape, sounds like they poked around these areas looking for aero tweeks
The new Fiesta was tested more than 150 hours in the wind tunnel to refine its aerodynamic efficiency, resulting in a 3 percent reduction in drag, further benefitting fuel efficiency and CO2 emissions. Improvements have been achieved in part through revisions to the front air-deflector design, the introduction of an enhanced rear spoiler, under body optimisation and careful configuration of light units to separate air flow and reduce the vehicle’s wake.
https://media.ford.com/content/fordm...nectivity.html