The £1.9 billion estimated cost increase consisted of £1,510 million of Crossrail Ltd costs, and £390 million of Network Rail costs. Schedule delay was the largest category of cost increase of Crossrail Ltd costs, accounting for £934 million. This was followed by £228 million of COVID-19-related costs.22 However, Crossrail Ltd told us that COVID-19 10 C&AG’s Report, para 3.17 11 C&AG’s Report, para 19, 3.17; Committee of Public Accounts, Completing Crossrail, One Hundred and Ninth Report of Session 2017–19, HC 2127, 19 July 2019 12 C&AG’s Report, para 3.17 13 Q 8 14 Q 28 15 Abbey Wood was not included in this list of central section stations as it is being delivered by Network Rail. 16 Q 7 17 C&AG’s Report, para 3.14 18 Committee of Public Accounts, Completing Crossrail, One Hundred and Ninth Report of Session 2017–19, HC 2127, 19 July 2019; Q 19 19 Q 19–22 20 C&AG’s Report, para 11 21 Values have been rounded and are in cash prices 22 C&AG’s Report, figure 8 10 Crossrail: A progress update did not impact on the programme schedule as it was able to recover the lost time.23 The Department told us the £390 million increase in Network Rail costs was due to historical issues, such as adding previously missing scope; impacts of the Carillion liquidation which took time and money to re-tender contracts; and lower than expected productivity of contractors.24