I notice that, my question funnily enough remains unanswered as people are quick to come out with the 'effing spotters' remarks rather than reasonable answers.
Absolutely right, LAX. And may I remind these contributors that ATC staff located in en-route ACC's a couple of hundred miles away are not concerned about logging reggies at MAN either. They're just tearing their hair out trying to persuade certain airports to help clear backlogged holding traffic with finite fuel reserves by accepting a reasonable share of the burden. And earning some revenue into the bargain. Some airports have a reputation for being really helpful in these high-stress situations, and some ... well, don't!