A tenant has died in his Flat. His mother, next of kin. Is to empty his belongings. Do I need to arrange a surrender of the AST with the next of kin? I'm happy to write it up, would a letter suffice stating the tenancy has been ended and both myself and next of kin sign? In addition his girlfriend died at the same time in the flat although not resident do her Next of kin have any legal right to consider?