The 10th BW was a training battalion from which trained men went to fighting units.
The draft RNGYH (just the code number for an overseas draft of men to somewhere) looks like his posting to 1st Battalion possibly to N Africa. Check the remainder of his record for entries with unit names which (unless lost) should be able to be cross checked with the dates. This bit of his record, as you have seen, says nothing. That said, where did you see he was in 1st Battalion?
MaxD