Exactly as with SL09 WUB, this Skoda belongs to a resident in the adjoining controlled parking zone (Zone G), who has opted to store their car in Hollingdean rather than renew their permit.
This can be verified using Google Maps Street View, where it can be seen parked on Hollingbury Road (in Zone G) for the past several years. During these times, it had a valid resident permit for the area in which the owner lived.
The vehicle is now consistently parked in Hollingdean, as close as the owner is able to achieve to their home (most commonly on Hollingbury Crescent or Adams Close), and still has an expired resident permit in the windscreen.
For the benefit of the doubt, the owner has not moved house but appears to have opted to use Hollingdean to park and store their vehicle full-time rather than renew their own resident permit further.
This is one of hundreds of similar vehicles all using Hollingdean to the same effect. This consumes what little available parking space there is for residents of Hollingdean, and particularly in the congested area around Hollingbury Crescent and Stanmer Park Road: closest to the owner's actual residence in Zone G.
Feedback suggests that the vehicle is moved infrequently, often left thoughtlessly parked, overlapping double-yellow lines or partially overlapping a local driveway.