I am at the Music school in Northampton most days of the week and spend a lot of time parked next to the red brick Victorian walis. These walls have some lovely plants growing on them . These lovely little ferns are anchored in the mortar. They are called Maidenhair Spleenwort – Asplenium trichomanes.
There are different plants around the walls , these deserve a closer look and a wall safari – watch this space !