Going to suggest a likely Saudi carrier and it’s neither Flynas returning again or Riyadh Air ( Gatwick is not the demographic that carrier is seeking to fill) no it yet another Saudi state owned carrier in the quiet throws of being set up . That is Neom Air.
Gatwick fits perfectly with the tourist demographic Neom is being set up to address.
Saudia already drop a weekly Jeddah flight into Neom enroute I believe and that authority could readily be ceded over .
The Saudi state airline authorities are working on scenario’ s to change the structures away from Saudia which will form the core services from Jeddah including religious related tourist flights.
Riyadh is projected as the centre for business and indeed a stab at a potential hub and spoke operation.
Neom is the epicentre to drive uptake in wealthy more general tourism ( albeit from an Islamic perspective)