I'm just wondering if the centile charts are updated on a regular basis, or if they are the same as they were 20 years ago. I was thinking along the lines of 'babies are getting bigger, children are getting bigger, teenagers are getting bigger', so a baby who is now deemed 'underweight' (as both of mine are) may be exactly what an 'ideal weight' baby was when I was a baby.
I'd be really interested to know.