HS2 boss: There will be bumps until we open the new line

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The High Speed Rail tunnel under Long Itchington in Warwickshire has been completed. It's taken five months to dig through, using a tunnel boring machine named after Dorothy Hodgkin - the first British woman to win the Nobel Prize in Chemistry. Mark Thurston is the CEO of HS2, and has been talking to CWR Breakfast with Phil Upton.