All nations have the right to govern themselves
Andy, the taxon nataliae is recognised by authorities but I repeat, differences from nominate are widely stated to be subtle (presumably based on skin searches) and so I suspect it is hardly likely to be confirmed as a vagrant to the west, unless using mtDNA (assuming there is a difference) or by stable isotope analysis. It is also said to be larger but differences are only very slight e.g Demongin (2016) gives philomelos wing 111-127.5 versus nataliae 112-130.
I think we need a good photos of ssp nataliae and more info on frequency, range and migration. Perhaps I wasn't clear as reading back, Ken made 2 statements. I wasn't saying it was this ssp, I was saying that more evidence was needed. And may be also using a bit of a wordplay about cline and incline.