The Strand Underpass is a one-way vehicle tunnel in central London connecting Waterloo Bridge to Kingsway near Holborn. Opened in 1964, it was built within the former Kingsway tramway subway, which closed in the 1950s.
Wikipedia https://en.wikipedia.org/wiki/Strand_Underpass
Coordinates 51°30'44.235" N -0°7'6.505" E