Nvidia have confirmed it now.
https://www.pcgamer.com/no-nvidia-rtx-3060-12gb-founders-edition-at-launch-rumour-suggests/
Good luck getting one for less than a couple of hundred quid over MSRP in the short term I guess.
Interesting that this is the first non-90 card with much more memory then. maybe the AIB's needed something to justify their higher price points, and nvidia agreed to get out of the way on this one.
Update: Nvidia has offered us the following brief statement confirming that there will be no RTX 3060 12GB Founders Edition:
“From time to time we decide not to design a Founder’s Edition card for cards targeted at the mainstream part of the market.”
That means the RTX 3060 launch in late February will be comprised of third-party AIB cards only. Make sure to keep an eye out for those when launch day rolls around."