new day and my head is a bit clearer so here's a bit of background to the decision to cull this colony.
about 12 years ago I had a colony in an orchard that I couldn't get near because they were so aggressive, I persevered and over several months and dozens of stings (and hundreds that didn't get through the suit) I eventually got them sorted. What I didn't know until later in the year, was that over that time the farmer was also getting stung every time he went in that field so I made the decision that I would not put up with it in the future.
So starting yesterday morning, this colony had a 50/50 chance of making it through the day, and about 1/3 of them have.
Yesterday afternoon I moved the hive a few feet to one side and in its place left a replacement box with mostly empty comb, 1 frame of food and 1 frame of brood including eggs from a nice colony. This meant that the flying bees would return to the empty box and will start to raise a queen from the frame of eggs.
Divide and conquer.
That bit went sort of ok, but I didn't put straps on the hive before starting to move them, and that oversight ultimately led to everything going to pot.
This is pretty much the same as making the decision to take an aggressive dog that's biting everyone it comes into contact with on a one way trip to the Vets