Also don't confuse "SVFR" with "SVFR clearance"
Because there is no such thing as VFR at night, in any airspace, a flight at night by a "PPl with night rating" is "considered" SVFR regardless of the airspace they are flying in, including the open FIR. This is not a SVFR clearance as in rule 21 airspace, if you wanted to cut the corner off, flying at night from White Waltham to Fairoaks you would still need to obtain a SVFR clearance from Heathrow ( Thames Radar 119.9 ).
SVFR at night is a technicality used to cover the fact that VFR at night is prohibited.
For further confusion a PPL does not need a night rating to fly at night. He can legaly fly at night if he does not carry any passengers. Not that anyone would...would they?
I, like everybody else will be looking at the ANO tomorrow for the definitive answer couched in the correct ( but confusing ) terminology.
See you all tomorrow
FBW