This is a lovely sharp piece of wildstyle writing from visiting artist Mario Messina (MM.Pat). I believe that this Sicilian artist is a tattoo apprentice, who must have been passing through Bristol sometime this summer.
The letters are beautifully picked out in chrome over a colourful cloudy background. This particular spot is behind a set of high railings, and anything that is sprayed here tends to stay a while because it is a bit of a fag to scale the railings with all your gear. I passed by today, and it is still there. A lovely piece.