HS2 Chilterns Tunnel North Portal view looking north from HS2 media release: https://mediacentre.hs2.org.uk/news/hs2-reveals-final-design-for-last-of-seven-key-chiltern-tunnel-structures

HS2 Amersham vent shaft - HS2 Media release https://mediacentre.hs2.org.uk/news/hs2-tunnel-progress-as-florence-and-cecilia-pass-amersham

HS2 TBM launch at Long Itchington Wood Tunnel - HS2 media release at https://mediacentre.hs2.org.uk/news/hs2-celebrates-launch-of-tbm-for-second-tunnel-bore-under-long-itchington-wood-in-warks

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