HS2 should have been a symbol of engineering excellence. Instead half of it has been scrapped and it's still running £50 billion over budget. This is the story of how Britain’s largest infrastructure project became its biggest scandal.

Reporter: Stephen Armstrong

Producer: Jonathan Lewis

Artwork: Lola Williams

Sound design: Dominic Delargy

Editor: Jasper Corbett

This episode is sponsored by The Life of Chuck. Join us across the UK for a preview screening on Wednesday 13 August, before it hits cinemas nationwide on 20 August. Find the locations and book now at SEEITFIRST.COM and enter the code CHUCK.

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