I may be imagining it, but did it used to be the case that if you had both a mental health problem and a physical health problem you had to get 18 points to pass the ESA medical, compared to just 15 points if you had just one?
I can't find anything online to confirm that, did I dream it?
ESA (WCA) requires a total 15 points regardless of mental or physical health.
IB (PCA) requires 10 points for mental health, or 15 points for physical health.
If you fail to score either of these, 15 points are required when you add the two together. However in this instance, less than 3 points for mental health will be disregarded and 6 or more points for mental health will count as 9 points when added to your physical health points.