If you google "The NHS" you'll see screaming headlines from the Daily Mail about cost and waste - debate in parliament is about how much of our GDP we should be spending - and each year, hospital trusts go cap in hand to ask for more funding.

Against this backdrop, a new analysis, and a first in a series, published on bmj.com, looks at what it takes to have sustainable healthcare - and cruically, talks about this from the point of view of benefit, not cost.