Hi Chloe,
I'm so sorry if it has taken up your time too much. I had a reply (finally) from the council who have said all they know is that the graves are in Section C. Apparently the paperwork has been lost a long long time ago, and they can't even confirm if there are headstones. They are going to email me the graves which surround Benjamin & Ann's, which should help locate it.
I will let you know as soon as I find out.
And thank you so much again for all your help - it is much appreciated.
Rach