Nonworking prototype mockup seems more like it.  While I can see the configuration as a 130 meter max. depth, is strikes me as a poor design, more for show than practicality.  Still, it is nice to see yet another project being launched by a wealthy person.  I wish Branson well.

"Sir Richard is expecting the sub to be delivered on February 20."

I should have realized it is not a sub -- enclosed vessel -- but a sled.   The passengers sit in open cockpits wearing scuba gear.