Three former executives at HS2 have spoken to Sky News to criticise the financial management of the project.
They include two whistleblowers who say they had previously identified problems to the company and now feel vindicated by an official report which criticised the spiralling costs of the project.
The government is expected to make a decision on whether or not to formally press ahead with HS2.
SUBSCRIBE to our YouTube channel for more videos: http://www.youtube.com/skynews
Follow us on Twitter: https://twitter.com/skynews
Like us on Facebook: https://www.facebook.com/skynews
Follow us on Instagram: https://www.instagram.com/skynews
For more content go to http://news.sky.com and download our apps:
Apple: https://itunes.apple.com/gb/app/sky-news/id316391924?mt=8
Android https://play.google.com/store/apps/details?id=com.bskyb.skynews.android&hl=en_GB
Sky News videos are now available in Spanish here/Los video de Sky News están disponibles en español aquí: https://www.youtube.com/skynewsespanol