Population UK 2010 62.51 million. 2020 67.89 million. Calculator out – an increase of 8.6%. So at a basic level demand for NHS has gone up 8.6%. Inflation in the decade has been about 25%. Then the increase in people over 65 increasing. Ok extrapolation is getting silly, and beyond my ability. But a basic calculation means that NHS spending should have gone up by 25% for inflation, then another 8.6% for population increase, and then more for the ageing population.