In 1978 the Gloddfa Ganol slate quarry reopened so the loco moved to FMB Engineering who regauged her to 24 inch and it was sold to the Provan Group. Rebuilt, with raised boiler and saddle tanks it was in steam by 2003, appearing at various narrow gauge railways. Again sold, arriving in 2013 at the Hampton & Kempton Waterworks railway. Later becoming their operating steam loco. In 2018 it was having an overhaul at Kew Bridge Steam Museum. In preservation acquired the name DARENT

Provan Gasworks produced town gas by controlled heating of coal in retorts. This allowed gas & tar to be collected, leaving only coke. A narrow gauge railway ran under the retorts collecting ash & waste. This required small locos. To see original shape of 984 see Andrew Barclay 2207 for a similar original loco.

Metropolitan Water Board Railway in 1915 built 3.5 mile 24 inch gauge railway which ran from a wharf on the River Thames to the pumping stations at Hampton and also Kempton Park. Three Kerr-Stuart 0-4-2ST locos costing £700 each arrived in 1916. When running fully the railway carried 760 tons of coal a week to the pumping stations which supplied London with treated Thames water. In 1927 more efficient steam pumps were installed. Later still new electric pumps and a conveyor moving coal from the river made the line redundant. It closed in 1945 and the three locos were scrapped.

The Hampton & Kempton Waterworks railway has opened on part of the old line with the intention to open all the line. Nearby is the Kempton Steam museum, which houses two 1927 built 1,000 ton triple expansion steam pumping engines. One of which operates on selected dates.