COMMENT: Is the devil we know better than the devil we don't?

And where agriculture is concerned the core issues at stake are the maintenance of the current CAP support systems and the free trade agreements that exist with the rest of Europe.

Cameron certainly isn’t swayed by the argument put forward by Secretary of State Theresa Villiers, who believes that more money could be available to support farming in Northern Ireland, in the wake of a Brexit.

His view on the matter is quite a simple one. He made it quite clear - while visiting the Johnston farm at Ahoghill last Saturday morning – that all bets are off regarding the overall impact of a Brexit on the British economy. And if the going gets tough, farm support levels may well diminish accordingly.

I was extremely impressed by the fact that the Prime Minister came over to Northern Ireland, essentially on his own, to converse at a very fundamental level with farmers on an issue that goes to the very heart of the challenge now confronting agriculture as a whole. He made his case for the UK to stay in Europe in very clear terms and delivered the message with a fair degree of passion.

All of this now leaves the stage ready and primed for Boris Johnson and his band of followers to put their case in favour of a Brexit. It will be interesting to hear their perspective on why farmers should opt to leave the EU. But whatever they say must be grounded in a fair deal of reality. One of the core problems which the Brexit campaigners face is the fact that the majority of cabinet ministers at Westminster are in the Prime Minister’s camp. So getting the key policy decisions they need to sweeten the Brexit deal – should it become reality - could prove more than problematic.