Decided to go over the 2nd hand groups one more time and keep looking for tables, and ended up finding a seller who was selling the contents of a bankrupt office. But not at used shops prices, always a big bonus! (100 euros including shipping)
I settled on a double workdesk as it came in just 4 pieces and 8 bolts, so that made it manageable to get up the attic. Assembling it took maybe 10 minutes in all, and I unscrewed one side, slotted it against the other table, drilled new holes and fixed it in place. So....now I have a 200cm x 160cm gaming table / hobby space.
The only issue, and it is a minor one, is that the height of the table is 72.5cm....but is has smallthreaded risers in the feet that I might be able to get risers to screw in or even lockable wheels, who knows.
Next up cleaning out more cases to see what I can sell, and try to get some 40x60 sheets of 10mm multiplex so I can add my large surplus of wheels underneath them and make my crates a bit more mobile (and save my back)
Also a plus: a large space for the girls to draw and play when Kim wants them out of the living room :D