As a Brit, I'd like to comment on this. I think there is a tendency here to be incredibly conservative when it comes to health and medicine, and nutrition as it relates to health.
Anyone who thinks for themselves and deviates from orthodoxy tends to be labelled a health or food faddist, or similar.
I think our NHS is partly responsible for this. Most people here (even political conservatives) support the NHS, and I do myself, in principle. It could be a major force for good, and it actually is in some, maybe many, areas. In practice though, it does tend to reinforce medical orthodoxy, and so people here are more inclined perhaps than in other places to believe the low-fat orthodoxy, that butter is bad, and that you should restrict your egg intake, etc.
(and if you even think about not vaccinating your children, you are considered to be almost as bad as a child murderer).
It's all very frustrating and sometimes makes me angry. Most of the time I just keep calm and keto on, and bite my tongue in most conversations about health or nutrition. Unfortunately, whenever I'm eating communally, I end up more or less having to "out" myself as a very-low-carber (no point in mentioning keto), and then of course, having to justify it. Annoying, as no one else has to justify eating the crap they eat.