Complex sentence: Manor House, 21 Soho Square is still in use as an office building and its most recent leaseholders include Stoll Moss Theatres and Really Useful Theatres and it is currently the headquarters of ticketing firm See Tickets.
Split into simpler sentences: Manor House, 21 Soho Square is still in use as an office building. Its most recent leaseholders include Stoll Moss Theatres and Really Useful Theatres; it is currently the headquarters of ticketing firm See Tickets.