Didn't it go under a couple of other names too ? Faces and Charlie Parkers ring a bell.Which is why me and my friends went there when we were seriously underage. Some of the Druids used to come down and they were reasonably pleasant - not that a bunch of spotty twats from Silverdale posed much of a threat.
I remember one of them being called Spanner.
The Underground was on Charles Street. Here, in fact.
https://www.google.co.uk/maps/@53.3...4!1s3ldn4ru41yXfCQdC3bqINQ!2e0!7i13312!8i6656