Of the £154 million allocated in 2001, Cross London Rail Links Ltd. (CLRL) had spent £140 million by the end of May 2006. This supported development of the scheme set out in the Hybrid Bill. The most substantial costs have been incurred employing staff, and carrying out transport, engineering and environmental studies.
Since 2001, Cross London Rail Links Ltd.—the company responsible for Crossrail design—has spent a total of £161 million on the Crossrail project.