I found that one too, having realised that I had the counting direction from Arman wrong and counted from Jordan, C/796, in the previous row instead. I've been poring over closeups of the blackened and pitted headstone and front kerb to try to make out any letters or plot number, but without success.
The problem is that if you work back from Arman you come to another possibility of an unmarked grave on the edge of the path between Sections Z and C. There appear to be one too many graves per row. It's not uncommon to have a separately-numbered column along the edge of a section, and before saying anything I was waiting for time to do some more investigation and maybe go back for another look.
On balance, I think the one Phil found probably is the Laxtons', but having been mislead too many times by perverse grave numbering schemes, I like to be sure.