NOTES: This building contains the ventilation tower and control station for Queensway Tunnel under the River Mersey connecting Liverpool and Birkenhead. It was shattered internally by a land mine and part of the structure was destroyed by bombing during World War II. Since no fire occurred, it was possible to reconstruct the building to its original pre-war design by Herbert J. Rowse.
NOTES: The Kingsway tunnel ventilation shafts are two identical structures on the opposite sides of the Mersey which provide ventilation for the Kingsway road tunnel. They were completed in 1971 when the Kingsway tunnel was completed between Liverpool and Wallasey.