Went and had a good close look (not opened) at the hives about 08.30. The hive that was "attacked" has cleared out its dead and was quite active with a goodly amount of bees flying around and another goodly amount bringing back dark yellow/orange pollen, some were bringing back a very white pollen. The other hive wasn't doing anything, no bees coming or going but had a fair amount of dead on the floor so, I took the entrance reducer away, gave the brood box a little thump, there was a ROAR from inside that lasted maybe 2 seconds then all was quiet BUT, a line of about 30 wee bees appeared at the entrance, looked curiously up at me, looked at each other then went and started draging dead bees out, all this was over a good ten minutes by the way, not right away. I said hello to them as they worked then left them all in peace.