well., A friend has sent me this mail a long time ago. (About 3 months ago)
All I can say it that it's not from UK (because I would have seen it) and it cannot be from any US english dilect using country, As you see, they have spelled the "Flavour with the "u", if it's US, they would spell it as Flavor"
It could be from Aus or NZ but not sure. However, the products of the same line n UK depicts a Mother and a small daughter on other flavours. But never came across this flavour.
So the memebers in Aus and Nz can check it out.
AFAIK, most of the countries use the US dilect., rather than the British one.