1969 Victoria line extension

In March 1969, the Victoria line was extended all the way from Warren Street up to Victoria, connecting with the Circle and District lines, and an occassion when the Queen took her second ride on the Tube, who unveiled the plaque (7 March 1969) at Victoria station.

Footage from 1969: https://www.youtube.com/watch?v=huPa6Qcs-SI