Oh oh - something (very small) to report!
Cg nipped off for 30 mins leaving cb doing the bathroom. So I legged it upstairs carrying the laundry basket as my prop but the bathroom door was closed. I lost my nerve last minute and couldn't bring myself to knock on it so thought I might as well actually put the washing away, instead of just pretending to. Was in my ds's room, opposite the bathroom, when out he came.
We engaged in bathroom talk (don't all swoon now) which in itself is progress - a whole conversation. Talk moved on to en suite discussion and I said (you're all going to be so proud of me) "do you want to see mine?' And he said yes! Well I don't suppose he could have said "not really", but anyway.
So not only has he now been in my bedroom, he said "this is a nice bedroom isn't it?". He liked the en suite too but that's by the by!
I have to own up to regretting my bravery and reverting to type by becoming monosyllabic and gazing at the floor once I had him in my room, and he must have been in there for all of 30 seconds, but still.
Tp hasn't shown again but the floor fitter has - he is large and hairy. Kitchen maker also shown - he is quiet and has three bulldogs 
Going to read everyone's posts now.