I find the headstone quite interesting, but unfortunately, I can't make out the entire information :(. My great-great grandfather was a John Collins, but I don't know what relation, if any, this grave may have with my ancestor. I have visited the resting place in Miraflores, Baja California, Mexico, where my great-great grandfather is buried. Can you determine a date from the headstone you discovered in the UK? Do you have the name of the church where you found the headstone?
Thank you for the info,
~ Elvia firstname.lastname@example.org