WHY-Its interesting to think how many times this specific wall amongst all the others in the undercroft have changed faces, that some of the 'street art' created here takes more time than a 'fine artists' work in their studio. Each time a new artist approaches it the old artists work is erased, its like a battle of skill, much like what goes on in the day. I love how it is an exhibition exhibiting voices of the unheard.