In the latest blow to the troubled HS2 project, it's emerged that as a result of the decision to cancel its northern legs, HS2's trains will have to be modified to work better on the existing network. What do these changes entail, and how have we got to this point? Watch to find out.

SOURCES:

https://inews.co.uk/news/politics/hs2...

https://www.bbc.co.uk/news/articles/c...