HE RESIGNED TODAY!!!!
I know, this is very very bold of me, but I am sitting typing this with a big grin on my face!!! He didn't appear in this morning, so N (the dept manager) rang his work mobile, thinking he might have shifted his days around without telling us again and be working from home today. Work mobile turned off, so she rang his own personal mobile. Long story short - words were said and he resigned.
Whether he is coming back to work notice or not, or just to hand back the phone, clear out his desk, we don't know (only found out all this had happened at about 2.30 this afternoon) - but the important thing is that he is gone!!! TI'm just so relieved that I don't have to put up with his crap anymore (or not for much longer anyway...)