Sounds like an accurate summary to me. Whatever China chooses to do with Hong Kong, the UK and others have little influence. As you say the Foreign Office can s

Sounds like an accurate summary to me. Whatever China chooses to do with Hong Kong, the UK and others have little influence. As you say the Foreign Office can send a memo. Chris Patten may have been deeply disappointed at London hadn't objected more, but that would have realistically changed nothing. So practically speaking it effectively is internal. Whatever that document might say. The clearest mistake, to my mind, of the whole handover was Thatcher being unwilling to grant passports for all.