The Society erected 36 plaques until , in 1901 , responsibility for them was transferred to the London County Council ( which changed the colour of the plaques to the current blue ) and , later , the Greater London Council ( the G.L.C. ) and , most recently , English Heritage .
The Society erected 36 plaques until , in 1901 , responsibility for them was transferred to the London County Council ( which changed the colour of the plaques to the current blue ) and later the Greater London Council and most recently English Heritage .