the kensal green gasworks was established in 1845 and worked until 1890 when a modernization created a small, 60cm line at the plant. the first engine was a decauville 5 ton 0-4-0T. it was numbered 2 (the number 1 being a standard gauge neilson 0-4-0T). then, in 1894 a bagnall inverted saddle tank 'iris' would be delivered. it presumably would not be numbered, as a second decauville would be delivered and numbered 3, named 'western' after the gasworks' original owner. In 1909, the gasworks line would be expanded and six years later a borsig 0-4-0t built in 1910 named 'nelson' after its original owner's company, Nelson Corporation. (the engine was purchased for construction of a reservoir). In 1916, the first decauville would be sold off to the ministry of munitions. After the first world war would end, the gasworks would purchase a Barclay 'E' class. In 1925, the gasworks would purchase a Sentinel 'BE' class and would later purchase another Sentinel in 1933 after the last decauville was scrapped, this one however being a 'convertible' class. it can also be presumed the bagnall was scrapped sometime between the purchase of nelson and the scrapping of the decauville.
post 1945 the narrow gauge system would become partially defunct, and the barclay and borsig would be scrapped three years later. the remaining two sentinels were scrapped in 1951. the entire line would close, and the gasworks would be demolished in 1970.
