Archive Research Standing Building Survey (Level 3) Measured Survey (3D laser scan) AOC Archaeology Group was commissioned by SGN to undertake a survey of two redundant gasholders, Gasholder Nos 1 & 2, at Yarnton Way in Belvedere in the London Borough of Bexley. The work has been undertaken as part of a wider programme involving the decommissioning and dismantling of the remaining redundant gasholders in the UK operated by SGN. Gasholder No 1 to the west of the site is a frame-guided holder with two lifts, an above ground tank and a nominal capacity of 1,038,897ft� (29,418m�). It is a 'Type 47' gasholder with shallow untapered fabricated standards combined with laterally stiff, horizontal-axis girders. Gasholder No 2 is also a frame-guided holder of a similar type, although with three lifts, and a nominal capacity of 1,022,000ft� (28,940m�). Both gasholders were constructed in the mid-20th century by Clayton & Sons Ltd, as late examples of their type, and as a standalone gasholder site. A Phase II survey is required to photograph the presently inaccessible crowns and also to inspect and survey the interior of the tank and bell of both gasholders during demolition, the results of which will be added to this report to create a final report on the gasholders and other structures on site.