This model by Les Johnson for a Slavery Memorial went on display at City Hall yesterday and will remain on show until 1 December. Memorial 2007 aims to raise £1.5m to pay for the sculpture and a memorial garden in Hyde Park. Good to see it isn't an abstract design, but it seems an overly complex tableau of poseurs celebrating the end of slavery. And sexist. Why no female slave? Why no drama? Why no pathos? This artwork needs a Michelangelo to bring it to life, and no more than one male slave, one female and one child: the nuclear family being split up and sold off. Given appropriate artistry, this would have great impact. Who is this memorial for? The descendants of slaves or for smug white folks celebrating a good deed in abolishing slavery? Come on. Rethink this inappropriate model before it becomes a costly failure.