The historic environment team at TEP carried out archaeological recording of gasholders and gasworks buildings at the former Marsh Lane Gasholder Station, Stanmore, Harrow, ahead of planned demolition works. Gasholder 1 was built by R and J Dempster in 1939, Gasholder 2 by Clayton Son and Co in 1928, and Gasholder 3 by S Cutler and Sons in 1959. All three were spirally-guided gasholders with below-ground tanks. As well as the gasholders a domestic building 'the Cottage' and a booster house were recorded.