The HS2 rail line failed due in part to a focus on achieving the highest possible speeds and political pressure, a review is expected to find. The scheme has been undergoing a "reset", and in March Transport Secretary Heidi Alexander asked HS2 bosses to look at lowering top speeds to save money. This latest report into HS2, expected to be published this week, is authored by former National Security Adviser Sir Stephen Lovegrove and has considered the implications for the civil service and