and still no-one can show that any of those campaigning for leave intended that this was a promise of what the country would do with 350 million a week post Brexit.

It doesn't matter one jot whether it was a promise or not. People believed that is what would be done and they were misled. As Iains pointed out, it was not a promise that a Mars a day would help you work rest and play, nor was it a promise that if you smoked Strand cigarettes you would be surrounded by friends. But that is what people were told and it is what sold the products.

DtG