FlicketyB I'm afraid I can't claim any credit for introducing Dr Briffa to Gransnet - it was actually Tegan a few months ago and now I'm a fan 
Aka Dr Briffa is not arguing with the general advice that people shouldn't consume more than 6g a day of salt, which is the current advice.
He is objecting to this claim on the NHS Choices website which is not properly referenced, and which is making a spurious claim.
On following the link, I found myself being informed that if the UK public were to reduce salt consumption by 1 g a day, this would save 4,147 lives each year as a result of a reduced risk of cardiovascular events such as heart attack and stroke.
He is also pointing out that the most recent Cochrane review (2011) of evidence found that restricting salt intake doesn't reduce the risk of death, heart attacks or strokes in people with either normal or high blood pressure.