Where are the flap track covers on this wing?
From the Vickers VC-10 repair manual:



General arrangement of VC-10 wing (picture source). Note the labelling of the Shock bodies as "flap rail fairings".

The flap tracks were inside the Küchemann bodies and the flaps were between them. This produced gaps between the five flap segments which made them less effective than the modern design of uninterrupted flaps with the flap tracks below them.