To ask the Secretary of State for Transport what proportion of the cost of the Jubilee line extension he currently expects to recover from Olympia and York, and other private sources; what is the current estimated cost in current prices of the Jubilee line extension; and whether private sector contributions to the line will be inflation-protected.

The approved cost of the Jubilee line extension is £1,042 million in 1989 prices, equivalent to £1,188 million in today's prices, although the figure is currently under review. The agreed private sector contributions are spread over a longer period than the construction; when costs and contributions are discounted to a common base year, some 17 per cent. of the approved cost is covered by contributions. These are not inflation-protected.