Provide L, M and S for every day of life in the

[eatyourpeas]

The WHO under 5s reference has an L, M and S value for every day of life. We are porting this part of the standard into UK-WHO at the moment. However, a valuable improvement would be to rework the UK90 reference to provide values for every day of life from 23w - 23 y

[eatyourpeas]

@fredho-42 LMK if I can help