The machine digging HS2's longest tunnel has completed its 10-mile journey under the Chiltern Hills.Florence, named after nurse Florence Nightingale, was greeted with fireworks and cheers from hundreds of HS2 workers who gathered to witness the moment near South Heath, Buckinghamshire, on Tuesday.It was launched in May 2021 near Rickmansworth, Hertfordshire.

The machine digging HS2's longest tunnel has completed its 10-mile journey under the Chiltern Hills.Florence, named after nurse Florence Nightingale, was greeted with fireworks and cheers from hundreds of HS2 workers who gathered to witness the moment near South Heath, Buckinghamshire, on Tuesday.It was launched in May 2021 near Rickmansworth, Hertfordshire.