The usual problem of trying to make definitive identifications from photographs. I am not at all sure 6 legs forward can be described as a give away for Segestria. Surely this is the natural appearance of almost any spider with a tubular retreat that waits at the entrance of the retreat.
I was waiting for comment from Claire about iridescence on the jaws (certainly depends on the lighting) and the radiating threads of Segestria species. Without these, I do not believe any reliable identification can be made.