No 1 gasholder, Kennington Lane Gasholder Station

This is a gasholder built between 1877 and 1879 by Corbet Woodall for the Phoenix Gas Light and Coke Company, and subsequently enlarged between 1891 and 1892 for the South Metropolitan Gas Company by Frank Livesey. Originally designed with two lifts, it was later expanded to four, including a flying lift.

The gasholder's wrought iron guide frame stands approximately 135 feet (41 meters) high to the tops of the guide rails—originally only 90 feet—with the crown of the flying lift reaching over 180 feet (55 meters) when fully inflated. The frame is structured with 24 T-section lattice standards, displaying a distinctive three-stage profile due to a central, untapered section inserted during the 1891-92 enlargement. These standards are constructed from flat bars reinforced with plates and angle irons, featuring webs divided into St Andrew’s cross panels that decrease in height towards the top to preserve proportions. Semi-circular gusset plates strengthen the riveted connections, and the standards are bolted to the tank via compact, hollow cast-iron base plates with bolts arranged along each side. The tops of the standards are rounded, and stays were added in 1890 to support extensions to the guide rails, which now have open, flared tops to catch the flying lift. The guide rails themselves are now of channel section, a change likely made around 1890.

Three rows of horizontal girders connect the standards, with the top and bottom rows being original. The webs are braced with shallow-sloped round bars forming elongated St Andrew's crosses, paired with vertical spacer bars of cast-iron, embossed with miniature Phoenix emblems. The middle girder, added in 1890, employs a simpler lattice design.

Diagonal bracing, consisting of flat bars, is present in two tiers within each panel of the frame, riveted at the ends to gusset plates and clipped where they intersect.

The original railings from 1879 surround the tank, composed of circular cast-iron standards and square rails. The tank itself, with a diameter of 218 feet (66.5 meters) and a depth of 44 feet 6 inches (13.6 meters), is constructed from traditional brickwork set upon mass concrete footings. The bell, which includes the upper flying lift, has replacement mid-20th century side sheeting, and the roller carriages are modern, making it unclear if any original bell fabric remains. The railings are specifically excluded from being considered as elements of special architectural or historic interest.