 The number and cost of managers, administrative and clerical staff certainly increased significantly between 1988 and 1992, but Full Fact concluded that "No-one knows the exact cost or benefit of the NHS internal market in England".The internal market was never introduced in Scotland, and was quickly abandoned in Wales, but there doesn't appear to be any evidence to suggest that the NHS is more efficient than in England.Such evidence is there is shows that performance across the UK is quite similar.