Some of our best loved British brands, including HP Sauce, Heathrow Airport and Cadbury are now foreign owned.
A third of the UK's infrastructure including energy and transport is owned overseas.
And of the top British quoted companies in the UK, more than half the investment in those companies is by foreign investors.
Some argue that it is vital for our jobs and wages that Britain remains such an attractive place for foreign investment.
Others are concerned that we have given up control of the country's "crown jewels".
One of the most controversial foreign takeovers in recent years was the sale of British confectionary maker Cadbury.
For decades, Cadbury was known for the generous conditions and social benefits it provided for its workforce.
But the acquisition of the firm in 2010 was met with anger and disappointment by many workers.
And Kraft later closed Cadbury's Bristol factory, in spite of an earlier promise to keep it open.
Kraft Food, now rebranded as Mondelez International, says it is planning a 75 million pound investment which would secure the future of the Bournville factory in Birmingham and the next generation of manufacturing.
But while Cadbury is still a well loved brand, it is no longer a British company in its own right.
That has led to accusations from the Unite Union that the government is "impotent" in being able to deal with foreign acquisitions.
In the car industry foreign investment has helped to save and create jobs.
Jaguar Land Rover was bought by the Indian group TATA five years ago, and has since enjoyed record success.
Former Director General of the CBI Lord Digby Jones is a corporate ambassador for the firm.
He says JLR's story proves that firms can still be British, even if they are no longer British owned.
Currently the Government can only intervene in takeovers when national security, financial stability or media plurality are threatened.
But the Business Secretary Vince Cable would like the powers to go further.
Britain is also a major investor in companies overseas, making it one of the biggest spenders when it comes to foreign investment.
ITV News Business Editor Joel Hills investigates Who Owns Britain - Tonight at 7.30pm on ITV.