Hello again,
As promised I visited Netley Cemetery today, and while there I photographed your Great grandfather's grave, and I have attached a copy of the photograph to this message for you - I needed to re-size the photo in order for it to be acceptable on the board, but if you would like a copy the original size I am happy to send it if you can provide an e-mail address (the original is 12MP, and just over 5Mb).
The photo is geotagged, so if you have a Mac you can go straight from the photo an aerial view of the cemetery. You might be able to do something similar on a PC these days, but I'm not sure it's quite as simple on that platform.
All the very best,
Tony