Archive Research Photographic Survey Written Survey measured Survey Structural Watching Brief AOC Archaeology Group was commissioned by SGN to undertake an historic building survey of the three redundant gasholders at Old Kent Road in Southwark, South-East London. This report presents the results of two phases of work. Phase I included a pre-demolition photographic, written and measured survey record of all three gasholders, and Phase II included a photographic and written record of Gasholders No 10 and 12 during the demolition process. Gasholders 10, 12 and 13 were designed by George Livesey and built between 1867 - 1881. A fourth gasholder - No 11 - was built in 1872 but was taken down in the 1980s. All three surviving holders are frame-guided holders consisting of a circumference of upright braced standards with roller carriages behind each for raising the lifts. Gasholder No 10 is a is a frame-guided 'Type 14' gasholder constructed in 1867, built by T Piggot & Sons and Dowcra & Son. It is 39m in diameter with two lifts and 12 cast-iron standards in a double Tuscan order with two tiers of lattice girders. Gasholder No 12 is a frame-guided gasholder constructed in 1875, also constructed by Piggots and Dowcra. Originally with three lifts (one a later flying lift) one of these was removed in the 1950s. With a mass concrete tank, it has 20 upright cast-iron standards which are punctuated by a quatrefoil design held in tension by wrought iron girders. The Phase II works exposed the iron and timber framing supporting the crown as well as the main tank, constructed of Portland cement concrete, the brick surrounding wall bonded into the concrete at every sixth course. This was the first time this method had been used in a gasholder having previously been used for dock wall construction. Gasholder No 13 is a frame-guided gasholder constructed between 1879 - 1881. Built with three lifts, the holder was constructed in a not entirely unique but innovative design which treated the guide frame around the holder as a single huge 'cylinder', named the 'cylindrical shell principle'. It has 24 wrought iron standards and is devoid of any outward decorative elements.