I just tried with the surname for a still born baby I am aware of. I know (from the graves cert which is in the family's possession) he was buried in Yew Tree and obviously I know the section and plot number.
I put the surname in the search and marked it as exact, put still born in the keyword and also marked it as exact. He was the only result.
HOWEVER, though there is an address on the listing, the section and plot number just has a line through it.
A quick look through the list using just stillborn and no surname indicates that section and plot numbers may well not be recorded for these burials.
Boo