(147) Concrete batching plant producing concrete for the tunnel walkways – Jul. 2024 (08_162)

(146) Looking north from the ‘down line’ tunnel portal towards the concrete batching plane – Jul. 2024 (08_163)

(145) Looking north from the ‘down line’ tunnel portal towards the South Heath cutting – Jul. 2024 (08_164)

(143) Looking north from the tunnel portal towards construction of the ‘up line’ porous portal – Jul. 2024 (08_165)

(542) Chalfont St Giles vent shaft looking north – Jun. 2024 (04_584)

(334) Constructing the boundary wall – (Oct. 2024 (05_358)

(333) Headhouse, access hatches and plenum – (Oct. 2024 (05_359)

(332) Cladding the headhouse – Oct. 2024 (05_360)

(331) Looking north towards the A413 – Sep. 2024 (05_351)

(330) Felting the headhouse roof – Sep. 2024 (05_352)

(329) Looking west towards the maintenance hatches and the plenum – Sep. 2024 (05_353)

(328) Looking towards the plenum – Sep. 2024 (05_354)