Billionaire businessman Donald Trump has threatened to pull out of future UK investment worth around £700 million if MPs ban him from the country.

The warning comes after Westminster set a date for a debate on whether or not to allow the Republican presidential candidate entry to the UK, after more than half a million people signed a petition that was launched after Trump called for all Muslims to be banned from entering the US.

Donald Trump poses for camera his Scottish golf course in Turnberry. Credit: Reuters

A statement from the Trump Organization highlights the group's intention to pour £200 million to further develop Trump Turnberry in the coming years, as well as the group's plans to invest £500 million towards further development at the 1,400-acre Trump International Golf Links.

However, the statement warns, "any action to restrict travel would force The Trump Organization to immediately end these and all future investments we are currently contemplating in the United Kingdom."

Donald Trump at a press conference during a visit to his Scottish golf course Turnberry. Credit: Reuters

Trump has a number of business interests in the UK, including Trump International Golf Links in Aberdeenshire and the Trump Turnberry resort in South Ayrshire.

The statement also says the move to ban Trump would "create a dangerous precedent and send a terrible message to the world that the United Kingdom opposes free speech and has no interest in attracting inward investment."

This would also alienate the many millions of United States citizens who wholeheartedly support Mr Trump and have made him the forerunner by far in the 2016 Presidential Election."

The Trump Organization

The US Presidential hopeful faced an international backlash after urging a "total and complete shutdown of Muslims entering the United States until our country's representatives can figure out what is going on".

Trump has denied claims he is a racist, insisting he is "doing good for the Muslims" with his call to ban Muslims from entering the US.

Justifying his comments, he also claimed there were "places in London and other places that are so radicalised that police are afraid for their own lives".

Prime Minister David Cameron condemned the remarks as "divisive, stupid and wrong" but made clear he did not support banning Trump.