Preparation started in September 1938 and the first set of shelters was opened on 28 October 1939 Stockport was not bombed until 11 October 1940.
The smallest of the tunnel shelters could accommodate 2,000 people and the largest 3,850. It was subsequently expanded to take up to 6,500 people.
This was one of the three built including one which is now a museum and you can visit. This one is abandoned and has been since WW2.
Similar ones were built in Manchester City Centre & Deansgate which remains undocumented.
