One of the things that was holding me back from working on the car was that my welding helmet was refusing to stay dark (I only discovered this after waiting a few weeks and making a special trip to the welding supplier to buy gas!). The new one arrived last week (it is ace), so I could get on with things. It's nice being able to see what you are doing before you spark it up and during (and it's blue rather than green for some reason).
I actually made some progress on Saturday. I glued in a metal reinforcing piece (one that I welded badly with my old helmet), which goes between the inside top of the dash and one of the bracing bars onto which the heater controls attach. I think that has really helped make the dashboard stiffer and hold the heater control unit in place. I also welded a small piece of rectangular tube to some sheet and drilled and tapped a hole, so hopefully I can glue that in place soon and provide something solid for the other side of the heater controls to attach to. The pictures I took came out terribly though, so I can't show that.

I used the leftover epoxy to fill a bunch of the cracks, so hopefully that will also help.
I also undid the steering column bolts so I could get the dash back in again, and I did up a bunch of the connectors I undid when I thought that I was going to be able to get the dash out with part of the loom still attached. I even worked out where most of the connectors go (I was vary puzzled for a while until I remembered that lots had to go on the back of the instrument cluster which happened to be on the back seat)! This involved much banging of my head on the windscreen, so took yesterday off!
One thing I am aware of is that when it all has to go back together, I will need to put this thing back in (it goes in the engine bay between the heater gubbins and the engine). As you can see from the picture, it's utterly knackered. I doubt I can get a new one, and I'm guessing this is a problem for lots of Y10s and Pandas - what alternatives are there to just sticking this monstrosity back in the car?