I managed to get a few hours on the van today and got the middle cross member welded in. 

I spent a fair amount of time practising my plug welds and stress testing them to make sure they were good and strong (doing them in the vertical position took me a while to get used to). 

Clamped in place:

welded to the chassis:

welded to the floor support:

and finished with a clean up and quick spray of electrox:

Really pleased with the results! This project also turned up for one of the guys in the unit across to me, which made me smile: