Further to your answer to Mayoral Question 2018/1611 you stated on 21st June 2018 that: "The Elizabeth Line is now 93 per cent complete and will transform travel across the capital when it opens. Thanks to the expertise and monumental efforts of everyone involved, it remains on course to open as planned in December 2018." Further, a TfL Board paper titled Crossrail Update, of the 25th July 2018, stated: "Progress is being made across all areas of the programme; however significant cost and schedule pressures remain across the project. These continue to be actively managed by Crossrail Limited and TfL and the focus remains on the successful introduction of Elizabeth line services in the Central Section (between Paddington Low Level and Abbey Wood) which remains on course to open as planned in December this year."
Please state in detail what developed in the last 10 weeks to lead to the expected opening across London to be postponed by nine months.