This is the email I received from the Warden at Feshie Bridge when I asked about the Scottish “no more than 3 households” rule:-

Hi Dell
I haven't been told to impose any restrictions. I'm assuming that groups are being left to make their own decisions based on current advice. I think the best plan would be to hold off paying for a while in case restrictions are imposed
Cheers
Gordon
So we have the booking still for the 14-18th Feb. if we want it and presumably not if folk don’t want to go.