Earlier today, the British Chambers of Commerce (BCC) published the results of its last survey on businesses' voting intentions ahead of the EU referendum poll on 23 June. 

Let's put to one side that this is a poll, and that pollsters have had mixed results in recent years, when it comes to predicting the voting intentions of the British electorate. 

The results are interesting for two reasons. 

First, the tightening of the lead between the two camps. 

With less than 50 days to go a majority of 54% of business people questioned said that they would vote to remain in the EU compared to 37% who favour 'Brexit'.  

That's a 6% fall in support for the 'Remain' vote in contrast to a 7% increase for the 'Leave' vote since the last BCC survey in February. 

Second, 90% of those surveyed said that they are unlikely to change their mind in how they will vote between now and polling day. 

With the minds of most business people made up, both the 'Remain' and 'Leave' camps will be fighting to persuade more of their business supporters to break cover and publicly pledge their voting intentions. 

Corporations are nervous over a potential consumer backlash, but these are high stakes. Business cannot expect the political leaders to make all the running. 

But maybe it's not consumer recriminations that's keeping most executives up at night, but more the immediate aftermath of the referendum. 

Whatever the result, this Conservative government will be fractured down the middle and at a time when Britain can least afford it. (In my view, it will be impossible for David Cameron to reunite his party after the referendum, such is the level of acrimony between both sides, but I suspect he's known for a long time that this will be his political swansong).

With global economic headwinds picking up once again, how the victors and the vanquished reconcile their differences and renew their focus on domestic policy will be the most crucial outtake from this EU referendum poll.