Michael Landy's "Scrapheap Services" is a 3D sculpture on display in the Tate Modern Gallery. It shows 3 men in boiler suits, their heads bent, as they are intent on their work in the disposing of `people who no longer play a useful role in society'.

The room is scattered with little people cut out of discarded material such as aluminium cans, cigarette boxes and fast food wrappers. Uniformed mannequins are in the process of sweeping up the figures, gathering them into bins, and consigning them to a shredding machine called "The Vulture", as vultures clear aware rotten carcasses the machine will do similar. The company's logo `Scrapheap Services' appears throughout the installation as a written notice of what is happening.

My initial feelings of the model are ones of curiosity. How long have they been working? How do they feel about the work? And will they ever totally...