The Mogden Pump Out Shaft scheme will upgrade the existing inspection shaft on the TWRM fresh water artery running beneath London to provide additional resilience of supply in the west of the capital.

Four pumps will be installed in the Mogden shaft and a new pipeline will be connected to the existing Kew main to the north of the site. A new surge column, surge tank, additional surge vessels and control panel will be installed on the outgoing connection.

A new cover will be installed over the 38m deep shaft.

Shane Gorman, Barhale’s Water Director said: “We are very pleased that Thames Water has chosen us for this important strategic investment which will provide crucial reinforcement for the water supply in West London.

“We do have the advantage of significant experience of the shaft and the Ring Main dating back more than thirty years.

“Recently, we have completed extensive inspections and replacement of the white caps along the two sections of the TWRM from the Kempton shaft to the Mogden shaft and from the Mogden shaft to the Kew shaft.”