From HS2 media site.

HS2 Aerial view looking directly down the shaft at Little Missenden from:https://mediacentre.hs2.org.uk/news/tunnel-progress-as-hs2s-florence-and-cecilia-reach-little-missenden

Mark Thurston, the CEO of Britain's mega project High Speed 2 (HS2). source: HS2 media release https://mediacentre.hs2.org.uk/news/hs2s-ceo-to-step-down-after-six-and-a-half-years

HS2 Media

HS2 unveils Bromford TBM courtesy of HS2 media release https://mediacentre.hs2.org.uk/news/hs2-unveils-huge-tunnel-boring-machine-ready-to-dig-hs2s-bromford-tunnel-in-the-west-midlands

HS2 TBM breakthrough in Warwickshire HS2 Media distribution.

HS2 Career Opportunities HS2 media release https://mediacentre.hs2.org.uk/news/hs2-launches-new-tunnelling-operative-career-opportunities

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