HS2’s longest tunnel reaches halfway point

Giant machines digging HS2’s longest tunnel have passed the half-way point, according to the firm building the high-speed railway (HS2 Ltd/PA)

Giant machines digging HS2’s longest tunnel have passed the halfway point, according to the firm building the high-speed railway.

HS2 Ltd said the pair of tunnel-boring machines (TBMs) have each made five miles of progress on their 10-mile journeys under the Chiltern Hills.