That's my cement mixer! Mike Nelson on turning the Tate into 'Fire sale Britain'

From engines to filing cabinets to tractor parts, the artist scoured asset-stripping websites for the things British companies toss out as they close or move away. The results ring with powerMike Nelson is feeling his age. He’s halfway through installing his new work, in the soaring Duveen galleries of Tate Britain, and as we sit down to chat, I notice the support strapped to his arm. The artist gives me a quick run-through of all the dislocations, injuries and strains that decades of vigo