The worst aspect of the programme, apart from the numerous errors and false assumtions, was the implied assumption that UK airports and ATC are in as bad a shape as our admittedly ramshackle rail system and overcrowded roads, when in fact, our aviation safety record is among the world's best.
Of course an accident like the one portrayed could happen. A 747 could run out of fuel and pancake on to Buckingham Palace. Anything in theory is possible in systems designed and operated by humans. The programme begs the question "so what?" LHR isn't the only airport in the world handling around 90 or so movements per hour on two parallel runways, is it? Surely the possibility of the kind of accident depicted has existed for as long as parallel runway operations have existed, which at LHR goes back to 1946.
The programme will reinforce a widely held view that aviation exists in a kind of barely controlled chaos, only just about held together by ATC, with aircraft coming within a whisker of hitting each other all the time.