Lichen found on the way to work in Whitechapel
No identification made yet.
No interactions present.
I think that these are green and white crustose lichen, found on stone and trees.
... unfortunately the images are a bit out of focus or taken from too far away, and I'm struggling to make out the details needed to try for an ID. The 5th image (bottom left) is better, and might be Aspicilia contorta, but I'm not at all sure about this.
Lat/Lng: 51.51593, -0.05892
OS grid ref: TQ347814
green space near London Hospital