THE first of six tunnel boring machines (TBMs) that will excavate around 13 miles of twin-bore tunnels under London was launched on October 6.
Named after Greenford High School teacher Sushila Hirani, who has worked for almost 30 years to inspire girls to study STEM (science, technology, engineering and mathematics) subjects, TBM Sushila began its dig towards Greenford from West Ruislip.