Heathrow Airport Holdings - the company formerly known as BAA - had its ownership of Stansted brought into question when the Office of Fair Trading referred the company's holding to the Competition Commission (CC).
After a long inquiry the CC ruled that BAA's airport ownership was uncompetitive.
The commission ruled in 2009 that BAA must sell Gatwick and Stansted and one of either Edinburgh or Glasgow airports. Gatwick had already been sold by the time of the ruling and since then BAA has sold Edinburgh.
More top news
Vladimir Putin has announced the withdrawal of a “significant” number of Russian troops from Syria during a surprise visit to the country.
Window blinds with cords should be completely banned to prevent children being strangled, a new study has recommended.
The NYPD are responding to a suspected blast at the central Manhattan transport hub near Times Square.