TUMBLEBRUTUS the cat lost one of his nine lives when four police officers decided to ask him for his ID. This posed a problem for one of the main characters in Sir Andrew Lloyd Webber's musical Cats which opens in Hong Kong next week. Not only is Tumblebrutus obviously a cat, but Stewart Crowley who plays him is a visiting Australian. And with the hectic schedule which lies ahead for the international cast, Tumblebrutus is unlikely to have time to apply for a card, even if a paw print would satisfy immigration. The police were concerned that a crowd was forming at the photo-shoot in Central's Pedder Street on Monday afternoon and demanded ID. Standing on his hind paws for a minute - that's about eight minutes in cat time - Stewart explained the shoot was just a cat's whisker away from finishing, and avoided being impounded. The show opens on Tuesday at the Lyric Theatre in the Hong Kong Academy for Performing Arts in Wan Chai. The theatre is booked through to April 30 but a good response from the theatre-loving Hong Kong public could induce an extended run. Spokeswoman for Sir Andrew's Really Useful production company Kate Pittard said the show had drawn good audiences in Melbourne and Singapore where it has just finished a seven-week run. Tickets for the shows range from $650 to $110, available from Urbtix outlets. ID cards may be required.