Actually it has

https://imgur.com/WrTXfQS

From 1970 the amount of money the UK spent on healthcare per capita bobbed kept bobbing around between 90% and 100% of 1970 levels (when adjusted for healthcare inflation of all G7 countries) until 1992. There was then a slight increase until 1998, large increases until 2004, then it dropped until 2012. It jumped massively in 2013, then dropped slightly in 2014, remaining steady through 2017.

Since the 2007 financial crash, UK health funding dropped in 9 years, and increased in 3 years

(figures from OECD total health spending per country)

Parent said relative to the rest of the world. Is that also false? You referenced inflation only

IMHO focussing on the NHS budget seems myopic. I haven't got the faintest clue about public health spending but there are so many things you can question like

- What is medical inflation compared to overall inflation?

- What do other countries spend?

- Are we getting value for money?

- Are key statistics getting worse despite increase budgets?

- How does population factor in to spending?

etc

Are you suggesting that one should only look at the absolute numbers? Staying at the previous year's funding is usually - in practice - a reduction for most welfare services.