The Mayor calculates that the gap between the £1 billion that the Treasury will give the Tube contractors each year and what is needed to maintain services is roughly £150 million. That money must come from somewhere. It cannot come from adding 15 per cent to London fares, already the highest in Europe. The money must come from taxes. It so happens that the necessary £150 million is almost what it is estimated the congestion charge will raise. On a crude calculation, London drivers will thus find themselves paying, not for a better Tube, but for the contractors' profit on the existing Tube. It is that daft.