The Dietary Guidelines Advisory Committee reported in February 2015 that "cholesterol is no longer a nutrient of concern" yet the Dietary Guidelines for Americans have NOT been changed to reflect this yet and may not be. The guidelines continue to advise a low fat diet currently.
Here's the page with links to DGAC report
http://health.gov/dietaryguidelines/2015-scientific-report/
Here's the link to the current Dietary Guidelines for Americans published in 2010
http://health.gov/dietaryguidelines/2010/ and you will clearly see on the page that low fat food is recommended.
This webpage shows the evolution of USDA dietary advice from the Basic 7 in 1943 through the Food Guide Pyramid, MyPyramid and My Plate, the latter introduced in 2011.
http://mobile.foodnavigator-usa.com/R-D/From-pyramid-to-plate-Evolution-of-USDA-s-food-guides
I would suggest that the NHS dietary guidelines have very closely followed the U.S. ones with pyramid and plate.
If you Search on YouTube you will find very many doctors coming out against people like Dr Robert Atkins M.D. and Gary Taubes on TV shows. Google and you will the same in newspapers, medical papers etc. The medical and political Establishment in the U.S. and also in the UK don't want to back down on guidelines that have done more harm than good.
And before you say that Gary Taubes isn't a doctor Ancel Keys had a degree in Economics and Political Science, a Masters in Zoology, a PhD in Oceanography and a PhD in Physiology, specialising in FISH physiology. None of those make him an M.D. or nutritionist either.
It is well known that Ancel Keys cherry-picked data for The Seven Countries Study to fit his diet-heart hypothesis and it was IMO scandalous that Nixon and McGovern allowed such incorrect science to shape the way in which millions of people have eaten since the 70s. They did so, because it suited them politically.
The U.S. government continues to subsidise grains. Not only that, it allows growers not to separate out GM crops from non GM for milling, even though many many consumers in other countries don't want to be eating GM.
There are imported US foods here now such as Kraft Dinner macaroni cheese, with stickers stating that they contain GM ingredients, yet these boxes would go unlabelled in the U.S.
The U.S. government also allows hundreds of pesticides and additives banned elsewhere in the world, bovine growth factors, routine antibiotics, CAFO (concentrated animal feeding operations) and Lean Finely Textured Ground Beef aka Pink Slime. There's a dead zone in the Gulf of Mexico, the size of Connecticut, caused by pesticide runoff.
I would suggest that the U.S. government is really not that interested in the health of American citizens and that's why Americans eat more organic food than any other country in the world.
Just because you and your friends and family don't eat SAD, doesn't mean that other Americans don't eat it either.
If Americans weren't eating SAD, there wouldn't be such an obesity problem in the U.S.. Every country which gets McDonald's, Coca-Cola etc from the U.S. ends up with an obesity epidemic.
I'm not anti-American, I have an American stepdaughter in Houston and I've visited lots - I went to school in Canada. Maybe I should have been clearer and said the U.S. government.
Medical science does change over time, even quite rapidly. But Ancel Keys was wrong about cholesterol and Professor John Yudkin was right about sugar.