Wall Art - 139

I visited a couple of the venues in the art festival which didn’t turn out to be good for photography. 
Both were in the east end of the city,  as is this gas purifying shed I visited last week.  I knew I would be back to photograph the murals on the outside wall.
The idea is that on the outside of the derelict crumbling building they have created a mural which depicts crumbling buildings from different eras including a medieval castle, tenement housing and modern flats. 
 
The work is fundamentally about regeneration.