The United Kingdom's vote on leaving the EU remains on a knife-edge.
It is still quite impossible to predict whether Britons will vote to remain a member of the European Union or leave the EU on June 23.
Poll results are a mixed bag, but an increasing number points to a "Brexit," although undecided voters are holding the balance of power.
If the TNS poll just released is genuine then we have— MineForNothing (@minefornothing) June 14, 2016
Leave : 47% (+4)
Remain: 40% (-1)
Don't Know: 13% (-3)#Brexit
Both sides of the U.K.'s Brexit referendum have made their last-ditch appeals to voters.
"We are stronger, safer and better off in Europe," London Mayor Sadiq Khan said.
"Even those who want us to leave admit it's a big gamble. And if there's one thing you should remember when you go to vote it's this — if we as a country decide to quit then we're out for good. There's no going back."
Boris Johnson, on the other hand, believes businesses would benefit if Britain left the EU.
"I've been amazed at how many passionately want to come out of the single market because of the rules and regulations that it imposes on 100 per cent of UK businesses — even though only 6 per cent actually do any trade with the EU," the former London mayor said.
Prime Minister David Cameron thinks leaving the European Union will be a "huge risk."
"Brits don't quit" he said as he warned the outcome "will affect your future, your children's future, your grandchildren's future."
Cameron promised to hold a referendum if he won the 2015 general election, in response to growing calls from his own Conservative MPs and the UK Independence Party (UKIP), who argued that Britain had not had a say since 1975, when it voted to stay in the EU in a referendum.
Most of the British big business are in favor of Britain staying in the EU because it makes it easier for them to move money, people and products around the world.
Concern that Britain, the world's fifth-largest economy, will leave the EU has also weighed on financial markets.
In an op-ed in the Guardian, billionaire currency trader George Soros said a "leave" vote could severely damage British living standards and potentially trigger a major crash in the British pound.
"I want people to know what the consequences of leaving the EU would be before they cast their votes, rather than after," he wrote. "A vote to leave could see the week end with a Black Friday, and serious consequences for ordinary people."