In fairness to UKIP I don't think it was their supported campaign which made the £350 million claim.
I did not see the broadcast either. It pains me to see it but it strikes me that at present Labour is clinging to the NHS issue like a refugee clinging to the wreckage. It IS an issue of course, and a serious one, but there are other things that need addressing also. When Mr Corbyn was asked why the people of Copeland should vote Labour in the by-election given some of Labout's other policies, he immediately changed the subject to the NHS, which, fairly or otherwise, sounded like avoiding the question.