My father-in-law and I built this last Saturday. It took us half a day to put together, but he did build the frames at his works.
It is 8ft x 6.5ft x 3ft high with 3 removable roof sections. It's boarded down one side of the run and on one of the three roof panel. I'm also waiting for the Runaround System to arrive to connect the hutch to the run.
We used 2" x 2" tanalised wood and 19g galvanised wire mesh stapled on the inside of the run. He got the wood as he's a builder but I bought the mesh from here...it's the same mesh as in the hutch.
http://www.meshdirect.co.uk/Wire-Mesh-13mm-x-25mm-19g.html
Shame you're not local to us, I bought a 30 metre roll as it was cheaper than buying two 10 metre rolls. I've still got well over half of the roll left over.
I also built two platforms and a outdoor shelter with the leftover outdoor hardwood ply. I have since covered these with roofing felt as well.
Hope this helps and good luck with the run.