I am sure someone with more knowledge (Coatham where are you!!!) will reply soon but in the mean time I will add what bit I know.
She was a British Rail ferry who then became a floating night club. Sister Ship Tuxedo Princess. Able UK bought her and berthed her on the Tees then transferred her to the basin with the ghost ships. Before they closed the gate to drain it and scrap the Ghosts and Clemenceau they took the Tux out and berthed her on the river by the Transporter bridge. Since then she has been vandalised and taken on water and is in the sorry state seen in the picture. http://www.sealink-holyhead.com/sealink/ships/siward/sol_tuxedo/home.html
gives more detail and pictures of her in better days