Requeened 5 colonies by uniting. Chose to requeen those which underperformed and those that were runny, stroppy or followed or had chalk brood. Since not a single colony swarmed this year I will probably be overwintering more than usual without requeening them even though I have enough queens to replace them. Gives me the chance to be very selective.
Darn!
One one of mine built queen cells this year and I though it was down to my good beekeeping! Seems like it's not been a swarmy year.