I've got a little list...

Worrying story which broke over the weekend (although it actually took place a few months back) of an Australian lawyer who was initially prevented from boarding a flight from Heathrow to Sydney because, she was told, she was on an "inhibited person list" which meant she needed special clearance before she could leave the country.  So is there such a list, and if so, what's it all about?  Nobody has been prepared to comment, but the only reason I can think of why there should be such a list, is that it consists of people who are on the point of being arrested for some serious offence, and it is to prevent them from fleeing the jurisdiction.  But this was somebody who, as far as is known, had never done anything controversial, and certainly nothing remotely criminal, seeking to travel back to her own country.  Our government, the US government and the Australian government have all denied operating such a list, so like I say, worrying.