| Description | View of open trench with main and valve; legend "Linacre Works Outlet IHP Booster In the top left hand corner is a portion of the valve connecting the Messenger Main with the inlet to holders. Slightly to the right is the valve connecting the IHP gas to the Messenger Main. Coming diagonally across the photograph is the 27in tee and the main gas supply from the IHP boosters followed by the IHP valve connecting the outlet of boosters on to the IHP main. In the bottom right-hand corner is the tee piece going through and under the wall on to the 30in IHP main (West Derby main)"; Ref M141; dated December 1946 |