To ask the Scottish Executive what (a) track and signalling and (b) station incremental output statements have been implemented in Scotland in each year since the inception of the Incremental Output Statement programme, showing, where possible, the actual or estimated costs of each scheme provided by it, the Strategic Rail Authority and other public sector sources; how many such schemes have been approved for implementation but are currently awaiting resources, showing indicative costs for each programme, and how many such schemes are currently being prepared by the Strategic Rail Authority and the Executive for possible future implementation, showing indicative costs for each programme. The development...