(121) Looking west over the tunnel north portal towards Great Missenden – Jan, 2024 (08_139)

(96) Chesham Road intervention shaft looking over the auto transformer station base – Jan. 2024 (07_90)

(95) The top of the intervention shaft – Jan. 2024 (07_91)

(94) Shuttering for construction of the headhouse walls – Jan. 2024 (07_92)

(93) Chesham Road intervention shaft headhouse construction- Jan. 2024 (07_93)

(92) Chesham Road intervention shaft headhouse construction- Jan. 2024 (07_94)

(91) Chesham Road intervention shaft looking south – Jan. 2024 (07_95)

(175) Little Missenden vent shaft looking west as construction of the headhouse gets under way – Jan. 2024 (06_227)

(303) Amersham vent shaft looking west – Jan. 2024 (05_329)

(536) Auto transformer station base – Jan, 2024 (04_575)

(535) Vent outlet building – Jan. 2024 (04_576)

(534) Vent outlet – Jan. 2024 (04_577)