Appendix One Our audit approach

1 This study examines the causes of the cost increases and delays to the Crossrail programme and whether Crossrail Ltd and the sponsors (the Department for Transport (the Department), and Transport for London (TfL)), have protected value for money in delivering Crossrail. The key areas we reviewed were:

• whether Crossrail Ltd managed the programme effectively; and

• whether the sponsors have appropriately managed the wider implications of the increased costs and delays.

2 Our audit approach is summarised in Figure 8. Our evidence base is described in Appendix Two.