BMW writes to its UK employees highlighting the dangers of Brexit. A French minister threatens to wave through migrants at Calais en route to Dover and to roll out the red carpet to welcome financial services to his country if we leave. Boris and others say none of this will happen. Great Britain still IS great. From his residence across the Channel Lord Nigel Lawson tells us not to worry. The EU needs us more than we need them. Confused? I bet many people are.

Like Lord William Hague, I'm an EU pragmatist. Better inside the tent etc. The remarks from Italian Prime Minister, Matteo Renzi, following last week's summit were very apposite. The 'negotiations' undertaken by David Cameron, while casually dismissed as 'thin gruel' by Eurosceptics like Jacob Rees-Mogg MP, have whetted the appetite of many recent, and not so recent arrivals in the EU for a fundamental change of direction for a project that started life in the aftermath of WW2 when many parts of the world were on their uppers and the numbers of nations actually making things was a shadow of what exists today.

So, we trudge towards 23 June with claim and counterclaim, with dire economic warnings if we leave which are brushed aside, rather like the SNP did in the Scottish Referendum, as scaremongering without really answering the question. However, what could tip the scales is migration, not necessarily from within the EU but from outside.

If the flow of migrants, particularly from the Middle East, continues and indeed increases as the warmer weather returns, the EU referendum will not be decided by rational arguments such as economics, our true place in the world or peace versus war but on how the world in general, but the EU In particular, deals with a crisis which is not going to go away easily, especially while combatants continue to bomb the hell out of each other in Syria and neighbouring states. And then there's the Palestinian question and the ongoing conflict in Afghanistan to consider as well. Let's not forget Africa.

We can spend our time arguing the economic pros and cons of 'Remain' or 'Leave', but, unless we can get a handle of immigration, it will be 'fear' of this phenomenon, whether rational or not, that will decide the result. It's already set to play an important role in upcoming German 'Länder' elections and some experts reckon that 'Mutti' Merkel's Grand Coalition could be in trouble too. And some of us Cold War 'warriors' foolishly thought back in 1989 that, when the Berlin Wall miraculously came down, all our troubles would be over. How wrong we were.