Partly true and partly not. 'There are precedents for trading, but one side just wants to scare the hell out of people and the other just wants to try and kill the scare.
Let's put it this way. When we're talking £12.5bn of which we pay net around £6bn, whether it is £350m or £650m it is irrelevant so long as the £6bn net contribution stands and the £12.5bn total contribution stands. Those figures are not really contested.
Let's put it another way. The general trading tariff for most goods for most countries, with the EU, is 3%. So if we did £100bn of export trade with the EU, then it would cost us £3bn. So we could afford to keep subsidising to the tune of 6.5bn, pay our own businesses the £3bn and still have £3bn in hand.
That is hardcore reality and the IN camp doesn't want to go there. So they keep on rubbishing the Brexit figures and trying to create dobut.
Of course that is not even reality. We don't even do £100bn of trade with the EU and we would impose exactly the same tarrifs on the EU as they did with us. The EU does an additional £30bn trade inwards to the UK than we do to the EU. So it wouldn't cost us even that postulated £3bn, it would cost us nothing, it would, instead, actually increase the £6bn that we would be getting back.
Never mind the fact that we would regain control over the additional £6.5bn we get as "largesse" from the EU and redirect it where it would do the best good for the UK, not the EU. Angel of the North and the other follies anyone??? Millions of investment in generating art and art based business put into a few hands for a few people to make their mark...
I was half listening to the radio tonight heading back from work when I heard "part funded by the EU" over the radio. Immediately followed by the semi ranting of yours truly shouting "No it's effing not it's funded by the UK money the EU takes from us"....
The propaganda is everywhere and most people who just don't care are going to believe it.
That, I believe, is a tragedy.