Rebuilt TBM launches into second HS2 tunnel drive

HS2’s 125m-long ‘Dorothy’ tunnel boring machine has launched for her second tunnel bore after four months of intensive work to dismantle and then reassemble the machine.
The second one-mile tunnel bore under Long Itchington Wood in Warwickshire marks the next big milestone for the  Balfour Beatty Vinci (BBV) tunnelling team on the northern section of phase one.
After operating around the clock in shifts over seven months, Dorothy became the first on the HS2 project to comp