
TBM Karen is boring HS2's final tunnel — 4.5 miles from Old Oak Common to Euston, 24 hours a day.
Named after one of Britain's first female train drivers, she's now being operated by @AvantiWestCoast drivers keeping that legacy alive.
The last of 11 HS2 tunnelling machines is now in motion. Watch the full story here 🎥 youtu.be/hosVOXUIqsk?si…

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