The UK-based auto market information company, Glass's, is forecasting that number-plate ('registration plate') changes planned for September in the UK will bring a surge in new vehicle sales. Six months away from the introduction of the change in September 2001, Glass's is predicting a surge in new car sales, and a slight softening in residual values. Glass's believes that new car sales in September will be boosted by the novel 'historic' affect of a new plate change. Used car prices or 'residuals' stand to be affected by the change.