HS2 Inside the Chiltern tunnel HS2 Media release source: https://mediacentre.hs2.org.uk/news/hs2-chiltern-tunnel-florence-and-cecilia-reach-4-mile-point-at-chalfont-st-giles

HS2 Chiltern tunnel south portal buildings source: https://mediacentre.hs2.org.uk/news/new-hs2-innovation-accelerator-opens-project-harnesses-artificial-intelligence

HS2 Launches first London TBM - Sushila image HS2 Media release

HS2 Tunnel Boring Machine Cutterhead in transport HS2 Media release.

HS2 Bauer Electric Drill (HS2 Media)

HS2 Retraining (HS2 media release)

HS2 Progress at Victoria Road Crossover Box - HS2 media

HS2 Noise cancelling Chiltern Tunnel north portal design (HS2 Media)

HS2 Chalfont St Peter vent shaft excavation HS2 media

HS2 Euston station concept design - interior - HS2 Ltd media