Polling is underway in UK on whether there should be a British exit, or Brexit, from the EU. Momentum has grown behind the EU exit campaign, which wants to end central control by Brussels and give Britain the freedom to manage its own affairs.

But David Cameron has warned people that if Britain chooses to leave EU, it will have repercussions on the country’s trade and investment.

David Cameron said, if Britain chooses to leave the European Union it would be a “big mistake” and would lead to “debilitating uncertainty” that can last up to a decade.

“We face an existential choice on Thursday. This country has a big decision to make – and there is so much at stake. It is simply common sense that if we left, trade would be damaged, and investment in Britain would suffer because businesses would no longer be able to access the EU from Britain in the same way. Our economy would therefore be smaller,” he said.

He even asked older voters to think about future generations in EY referendum vote.

German Chancellor Angela Merkel said, she hopes that Britain will vote to remain in the European Union in the June 23 referendum.

Britain and Germany have traditionally been allies in the EU on matters such as free trade. “From my point of view, Great Britain remaining in the European Union is the best and most desirable thing for us all,” Merkel said.

(With inputs from Reuters)