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Heathrow airport's operator is transferring its international HQ from the UK to Amsterdam as a result of of Brexit.
Spanish-owned Ferrovial says it wants to preserve inside EU laws after the UK leaves the EU.
The firm at present runs its US, Canadian, Polish and UK operations, which incorporates Heathrow, from Oxford.
Ferrovial is the biggest shareholder in Heathrow with a 25% stake, and within the UK it additionally owns Aberdeen, Glasgow and Southampton airports.
An organization spokesperson stated: "The reason for the move is to maintain the group's international companies under the umbrella of [EU] legislation."
Ferrovial moved to Oxford simply three years in the past to the previous headquarters of building group Amey which is purchased in 2004.
In the previous few days, a number of firms have expressed worries over the affect of the UK leaving the EU.
Last week, Airbus warned that it might depart the UK if the nation exits the European Union single market and customs union with out a transition deal.
The Society of Motor Manufacturers & Traders has acknowledged that Brexit uncertainty is "thwarting" selections by main automobile firms to put extra money into UK factories.
Its feedback got here because it stated funding in Britain's automobile business had fallen to its lowest stage because the monetary disaster within the first half of the yr.