The high-speed rail project is now tens of millions of pounds in the red and an expensive bat tunnel is the latest major cost. With its future in doubt, how did it all go so wrong?

Featuring Christian Wolmar, host of the podcast Calling All Stations - https://shorturl.at/KTypI

Writer and producer: Eleanor Biggs

Photography: Jon Jones

Host: Tomini Babs

Executive Producer: Rebecca Moore

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