Because government departments in London control the purse strings, they also like to keep track of how money is spent.
However, multi-engined aircraft - like the one that crashed - can be provided with ATC clearance to fly elsewhere in the London Control Zone.
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In the London control room, all five of the capital's airports are under separate supervision from the rest of Nats' domain, which includes Wales, Scotland, Northern Ireland and most of England.
Mr Blair's only problem thereafter may be the extent to which Scottish Labour politicians take him at his word and use their freedom from London control to move Scottish politics away from the New Labour agenda.
The LSE board may prefer the approach from Euronext--the owner of the Paris and Amsterdam stock exchanges, which pledged to give London significant control over the U.K.'s markets.
Another thorny issue is the new mayor's relationship with the 32 London boroughs, which currently control most of London's public services.
In 1985, the Egyptian Al-Fayed brothers won control of the House of Fraser in London and thus gained control of the department store Harrods.
London-based Control Risks is among the leaders in the corporate security industry at navigating the paperwork complications of keeping ships secured.
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Equally, foreigners did not at first appreciate that a new and stronger hand was now in control in London.
But the Welsh party is licking its wounds from the leadership battle, and has been damaged by the appearance of control from London.
The family's odyssey began on Aug. 8, 2011, when police lost control of London, as thousands of mostly young rioters smashed shop windows, looted items and set objects ablaze across the city.
But Mother Nature protects her treasures well, hiding them in hard-to-reach places, he says, and the people that look after them have little incentive to surrender control to London, Wall Street or anywhere else for that matter.
Trailing 2-1 from the first leg in London the French club took control of the tie when Maxime Gonalons headed them in front.
For this reason there is one key difference between the London and national air traffic control rooms - and the first clue is the noise.
Prosecutor Jonathan Ashley-Norman, for the Office of Rail Regulation, said there could have been a "terrible tragedy" had it not been for the "prompt and skilful actions" of London Underground staff in the control room.
Dr Jaafari, back from exile in London, is struggling to regain control.
To determine which countries were the most dangerous, we asked iJet and Control Risks , a London-based risk consultancy, to provide us with their watch lists of high-risk countries.
There has been no single body in overall control of enforcing the London Weighting allowance since the 1970s when the now disbanded London Pay Board had responsibility for it.
Mittal, a private London-based company that gained control of America's International Steel Group earlier this year, is set to boost annual output to over 65m tonnes with the Ukrainian acquisition.
The commission says London's government should take full control of the tax, determining the number and range of bands, and each authority setting its rate, free of government constraint.
The panel also noted that the "evidence suggesting very clearly that the analyitcal results reported by DCC (Drug Control Centre, Kings College London) in connection with the A sample were difficult to interpret".
BBC: Turnbull didn't learn of the positive test for nine months
While hardly a sympathetic figure, Duggan has become a martyr in the erupting violence in London as police there are unable to control spreading riots and looting in Tottenham, a district in the northern part of the ciy.
FORBES: Police Shooting Leads to Massive Riots, Looting in London
Mr Morre told BBC London through his solicitors that he had "no control, influence or connection" over CMS Mortgages.
Companies such as Armor Holdings, or Control Risks, a consultancy based in London, are always keen to stress what they do not do.
Large teams of officers in full riot gear took control of parts of the City of London when they were met by a small number of trouble-makers.
In the last couple of months, when the London street-crime boom has been brought under control, the Met has shown that diverting officers to deal with it can make a difference.
By now, Abu Hamza had seized control of Finsbury Park mosque in north London, evicting the moderate, mainstream Muslim clergy and using it as a base to propagate his violent messages of hatred around the Middle East.
Nor does it take into account the Scottish government's proposal that Scotland should use the pound, but at least majority control of its monetary policy should be in London.
Nick Catrantzos of the Control Risks Group, an international firm based in London, England, said kidnapping groups are organized and entrepreneurial.
In September he tried to get a paramilitary force to seize control of Baghdad airport during a pay dispute with a London-based firm that runs airport security.
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