Members of the tunnelling team inside the cutterhead at the breakthrough of TBM Cecilia at Chiltern tunnel

Along with HS2 Media release https://mediacentre.hs2.org.uk/news/hs2-britains-new-high-speed-railway-takes-shape

file: https://mediacentre.hs2.org.uk/resources/members-of-the-tunnelling-team-inside-the-cutterhead-at-the-breakthrough-of-tbm-cecilia-at-chiltern-tunnel