See also this from Google StreetView of a 360-degree image very close to the graves concerned. The section M grave in the immediate foreground (Pilditch) seems likely to be 8329 on the plan, which is useful for orientation. That would put the first of our possibles somewhere close to the evergreen tree to the left and behind.
https://maps.app.goo.gl/2cTTnLn4vNSyr8pr8
