Forgot to add, nice video .
Clip then mark

, personal preference;, don't want to be messing about with a queen before her 'bindy' is properly dry

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The cage is an introducing device! , therefore the separation of the attendant workers is done at the same time as the marking/clipping of the queen, followed by the introduction of the cage into the colony selected to receive her (a nuc if possible ),after checking for queen cells/ cups etc. The bit of tape covering access to the fondant plug should be left intact and the cage checked in 3 days time, this check is to ensure that the bees haven't again started any qcs and are not crowding the cage (a sign that their intensions are hostile) if all ok, then tape is remove and colony left well alone for a couple of weeks . Too much interference at this time can cause the bees to reject her even after she has started laying !.
Sorry Pete for going off topic but the questions needed an answer

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John Wilkinson