My understanding was 12-14oz a day which is more than half a pint from 1 until I looked recently - it's not that much more than half a pint though really!
YK I think they just rounded it all to an easy to remember figure. half pint, 300ml or 10oz. They are all different amounts but as no one really measures how much cheese kids eat along with their milk drink, cheese sauce, white sauce, rice pudding etc etc etc I just assumed that's why it was a rough guidance.
Ha - here's me talking about amounts, mine took less than half a pint of milk between 6 - 12 months no matter what I tried to increase it. I just accepted in the end that he self regulated to his dairy needs.