Chiltern tunnel (English Wikipedia)

"Design of Chiltern Tunnel and ventilation shaft interfaces". HS2 Learning Legacy. 17 September 2020. Retrieved 14 September 2023.
"Aerodynamic design of HS2 tunnels". HS2 Learning Legacy. 24 February 2021. Retrieved 14 September 2023.
"Design of Chiltern Tunnel South Portal". HS2 Learning Legacy. 17 September 2020. Retrieved 14 September 2023.

assets.hs2.org.uk

"HS2 Corporate Plan 2021–2024" (PDF). Archived (PDF) from the original on 21 December 2021.

infrastructure-intelligence.com (Global: low place; English: low place)

"HS2 confirms Chilterns tunnel extension". Infrastructure Intelligence. Retrieved 19 March 2021.

itv.com (Global: 494^th place; English: 290^th place)

"Work begins to create a tunnel through the Chilterns for new HS2 rail line". itv.com. 13 May 2021.

mediacentre,hs2.org.uk (Global: low place; English: low place)

"HS2 tunnelling machines reach Chalfont St Peter ventilation shaft". High Speed 2. 14 March 2022. Retrieved 17 August 2022.

modernrailways.com (Global: low place; English: low place)

"Work on longest tunnels set to begin". Modern Railways. 17 March 2021. Retrieved 16 July 2022.

newcivilengineer.com (Global: low place; English: low place)

Hakimian, Rob (22 March 2024). "HS2's 16km Chilterns tunnelling completed with second TBM breakthrough". New Civil Engineer. Retrieved 23 March 2024.
Horgan, Rob (14 June 2021). "The reality of working on HS2's biggest construction site". newcivilengineer.com.
Horgan, Rob (14 June 2021). "The reality of working on HS2's biggest construction site". New Civil Engineer. Retrieved 23 January 2026.
Hakimian, Rob (15 July 2022). "HS2 timeline of major events to 2025 revealed". New Civil Engineer. Retrieved 16 July 2022.
Moore, Catherine (19 December 2023). "HS2's Chiltern tunnelling reaches 90% completion". New Civil Engineer. Retrieved 20 December 2023.
Horgan, Rob (27 April 2021). "How HS2 plans to reuse chalk slurry from Chilterns tunnel to 'rewild' the Colne Valley". newcivilengineer.com.
Kanaris, Sotiris (27 June 2023). "Future of Tunnelling: Four High Speed 2 twin bores progressing well despite challenges". New Civil Engineer. Retrieved 14 September 2023.
Johnson, Thomas (14 February 2024). "HS2 | Two more sinkholes form on Chilterns tunnelling route". New Civil Engineer. Retrieved 14 February 2024.
Hakimian, Rob (28 February 2024). "HS2 Chilterns TBM overcame difficult geology and clogged slurry pipes to reach finish line". New Civil Engineer. Retrieved 29 February 2024.
Hakimian, Rob (27 February 2024). "HS2 celebrates completion of first 16km drive for Chilterns tunnel". New Civil Engineer. Retrieved 27 February 2024.
Hakimian, Rob (22 March 2024). "HS2's 16km Chilterns tunnelling completed with second TBM breakthrough". New Civil Engineer. Retrieved 23 March 2024.

publishing.service.gov.uk (Global: 1,877^th place; English: 1,129^th place)

assets.publishing.service.gov.uk

A., Evans (28 May 2015). "High Speed Rail in the Chilterns Part 2: Chiltern Long Tunnel Proposal" (PDF). gov.uk.
Evans, A (28 May 2015). "High Speed Rail in the Chilterns Part 1: General Long Tunnel Requirements" (PDF). HS2 Ltd. Retrieved 5 July 2022.

railengineer.co.uk (Global: low place; English: low place)

"Colne Valley Viaduct – HS2's largest bridge". railengineer.co.uk. 7 June 2021.

railpro.co.uk (Global: low place; English: low place)

"Green light for HS2's ambitious Chiltern tunnel chalk grassland project". railpro.co.uk. 21 June 2021.

railuk.com (Global: low place; English: low place)

"HS2 completes first tunnel cross passages". RailUK. 22 August 2022. Retrieved 22 August 2022.
"HS2 Chiltern tunnel - 'Florence' and 'Cecilia' reach 4 mile point at Chalfont St Giles". RailUK. 10 October 2022. Retrieved 11 October 2022.
"HS2 celebrates milestone in Chiltern grassland transformation". RailUK. 8 September 2022. Retrieved 11 September 2022.

railway-news.com (Global: low place; English: low place)

"HS2 Casts First of 112,000 Chiltern Tunnel Wall Segments". Railway-News. 19 March 2021. Retrieved 19 March 2021.

theguardian.com (Global: 12^th place; English: 11^th place)

"HS2 to 'rewild' 127 hectares around its 10-mile Chilterns tunnel". The Guardian. 3 March 2021. Retrieved 19 March 2021.

volkerfitzpatrick.co.uk (Global: low place; English: low place)

"Align JV reach milestone with the casting of the final segment for new tunnels". VolkerFitzpatrick. 20 December 2023. Retrieved 23 January 2026.

web.archive.org (Global: 1^st place; English: 1^st place)

"The HS2 Tunnel Boring Machines (TBMs)". High Speed 2. Archived from the original on 3 March 2021. Retrieved 20 March 2021.
"Progress at Chiltern tunnel site as HS2 prepares for arrival of first tunnelling machines". Archived from the original on 16 September 2020. Retrieved 30 July 2020.
"HS2 high-speed rail project begins underground tunnel". BBC News. 13 May 2021. Archived from the original on 12 May 2021. Retrieved 13 May 2021.
"HS2 Corporate Plan 2021–2024" (PDF). Archived (PDF) from the original on 21 December 2021.

Chiltern tunnel (English Wikipedia)

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