I don't see it has covers for the flap tracks, so,where are the covers for the flap tracks?
Image taken from the English for Aviation book (Oxford).
The aircraft is a Vickers VC10
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.
They look like Fowler flaps, like on Hercules c130. If that's the case the flaps run on screwjacks and rollers and slip up and into the wing when cursing. All the mechinisums are shrouded by the flaps themselves when retracted and hence no drag. On takeoff and landing the drag is overcome by takeoff thrust and on landing augmented by airbrakes to reduce landing speed. The flap tracks are in the wing and accessable only when the flaps are extended/ deployed.