Hi Guy's ...To update, hoping for some good advice
Opened up yesterday National on double brood, objective to locate queen clip and mark, spent an hour plus looking for her, took the advice here and additional advice got.
Moved top brood box about 10 foot away hoping many would fly back to original site allowing for easy inspection , and hoping as I was told, she should be up in this box, went through it twice, each frame, then went through the bottom box once, each frame.
Was cross eyed by the end trying to spot her amongst at times the layers of bees. Didnt smoke at all as previously found this only makes them layer/bunch up even more on the bottom of the frames as they go into preservation mode.
Anyway, as stated despite careful checking couldn't find her
Plenty of new eggs lying flat in base of cells and incredibly healthy strong colony , good drone population, and large amount of healthy brood capped, no sign of any queen cells.
Added a super to give more space and distraction and also removed two full capped frames of brood and added to a weak polynuc nearby, replacing with 2 frames of undrawn foundation in the centre of the top brood box.
Maybe she wont swarm, last years newly mated queen raised after losing the original queen through swarming.
Valuable lesson learnt... never again will i leave , should/could in hindsight have easily found her whilst on single brood box when numbers were lower in March ... Ahhh ..
Only copped 2 stings to the hands during whole exercise , they were incredibly well behaved but mood changed in last 10 minutes and the pinging started, wouldn't blame them !
Look again in a week ? leave a bit longer before repeating the search.
Now what the hell to do..... ???