Advice from "Fairfield" - keep checking food supplies. Even though the bees are flying it is unlikely that they are foraging more energy than they are using and so will be consuming stores.
Much in the same vein:
Just a note of interest for the members - use of fondant seems very variable this year - of my 3 colonies one has devoured everything, one has been steady and the other hasn't touched it - and the level of use doesn't match the size of the colony or the stores left with them after taking supers off.
Also they have been very active here over the last 3 days - which though comforting to see hives with live bees isn't good in mid January and will surely increase their use of stores?