If chairs could talk what stories they'd tell. Well this one does. London until very recent years was grubby. Yes I know if you walk down Oxford Street you'd say nothing has changed. However this seat tells a different story. Actually it is the lichen that tells the story.
As recently as 1977 a mere 11 varieties of lichen could be found, due to the pollution of coal fires. Now they are fairly common place with this public garden boasting 38 different species.
