Update from a few weeks ago. Decided to split the nasty hive, new queen in the strong half and old queen in the weaker half. Didn't work out that way, broke down the hive into three boxes, one super and 2 brood boxes, was going to split brood and resources and place the new queen in the original position. Started pulling frames while looking for the queen, found her on about the 2nd frame I pulled, she gave me just enough time to spot her before she took off, straight up into the sky and out of sight. Finished the split, shook extra bee's into the new queen's hive, made sure the queen less hive had eggs and lava and left it in the original position. Checked both hives a few times over the last few weeks, queen came back and is laying, still a little nasty but not as bad, new hive is doing really well and quiet already with two different coloured bees.