It’s in Sackville Gardens, a small park bordering Canal Street, aka the area in Manchester commonly known as Gay Village.
Alan Turing was a brilliant computer scientist and mathematician, who worked on first computers at the University of Manchester and during WW2 was part of a team at Bletchley Park, working for the Government Code and Cypher School, cracking Germany’s military codes. Unfortunately he was not treated very well and was prosecuted because of his sexuality. He was granted a posthumous pardon in 2013.
Essentially, Alan Turing is the godfather of all modern computers.