These 6 charts show how immigration will make or break Brexit

Britain will vote by the end of 2017 whether to leave or remain in the EU. According to some reports, such as the The Times' political email briefing "Red Box," Brits will get that chance on June 23 this year.

The number one issue dominating the outcome is immigration.

In fact, these six charts, included in a comprehensive research note by Philippe Gudin and his team at Barclays, illustrate how important immigration is to Britons and therefore how the developments over the EU migrant crisis and whether Prime Minister David Cameron can seal a new deal with the EU could sway the vote.

Cameron made it clear from the start that he, and Chancellor George Osborne, would prefer to stay within the 28-nation bloc and is banking on securing a better deal with the EU over key issues such as benefits for migrants.

While investment banks, think tanks, politicians, businesses, and the public have all released reports and opinion over what the better option is, the Conservative government is frantically trying to thrash out a deal with the EU over immigration. Currently, any EU migrant can show up in the UK and immediately start claiming benefits - and the Conservatives want to stop this.

In place of that policy, Cameron wants EU rules changed so that immigrants must wait four years before they can claim benefits in the UK.

But while Labour and others criticise Cameron and the Tories for their focus on migrants, the Conservative-led government is actually appealing to the number one issue for Britons who get to vote - immigration.

The six charts below show how immigration will make or break a Brexit: