Bottom House Farm Lane
Chalfont St Giles vent shaft is situated off Bottom House Farm Lane a mile from the A413. A temporary haul road has been constructed alongside the lane to provide access to the site. The lane has been stopped up at the junction with the A413 whilst the haul road is in place and will be reinstated when the haul road is removed in 2025.
Access to the lane is via the haul road and a short link west of the Misbourne bridge. The lane was closed for most of 2021 to enable it to be widened and drainage to be installed. It remains single track with passing places. In order for this work to be carried out, over half a mile of important hedgerow was removed. Replanting took place in the spring of 2022.