I think that the BMI " one size fits all" in the UK if flawed.
Many years ago it was more sensible. My GP had three tables for BMI.
He measured my wrist and then selected the appropriate table to give me my BMI reading.
The wrist reading was a good indicator of bone structure.
I know I could do with loosing some weight but the present UK BMI test gives a much more favourable result . Why? I have small hands, feet, wrists plus thin arms so the BMI test ignores all these and boosts my " good" scoring.