They became worse, utter nightmare and only been the fact i've spent the past 3 years reading this board/all the advice (and building experience) i never ran away never to return.
So feeling confident took the 3 supers off to expose the BB, went to remove the first frame, hive explodes, i'd even covered the frames with a cloth (just in case). So put everything back to quickly ponder a plan. No warning bumps just direct attacks/stings, never experienced that.
Strapped the hive picked it up (70kg?) and carried it 10 foot away, placed a nuc box on original site with foundation, then started to open the hive to release the most evil bees. Removed the supers and placed on another hive ( after about 30 mins) to reduce the volume. Then took a couple of frames from the BB and replaced some of the foundation (oh what fun) veil was covered.
Needed to find and despatch the queen, carried the BB 100 feet away then opened that up and tried to get all the aggressive bees to attack (not much effort required), this worked perfect as after a couple of cycles they flew back to original site. The remaining bees seemed far more chilled allowing me to go through the frames and find the witch, result.
Plan to introduce the new queen (caged/plugged) to BB today, move the Nuc from hell 10 foot away and place back on original site.
Weather was an utter pain, sudden downpours not forecast so adding to the stress and a change of plan.