FBW,
"There is no VFR at night. Any flight operating at night that is not able to comply with IFR procedures ( e.g. pilot not IR rated ) is considered SVFR."
If we're talking about the UK here, you can only be SVFR in a Control Zone.
The UK has a separate night rating to allow non IR rated pilots to fly at night. Inside a CTZ, at night, such a night rated pilot can fly SVFR. As soon as they leave the CTZ they must revert to the IFR.
Again, just to make it clear, in the UK SVFR is only available inside a Control Zone.
WF.