Locating My Grandparents Grave In Hitchin/Letchworth.

A Memory of Norton.

I do not have a memory of Hitchin or the church, as I live in Canada, but I have a photo of my grandfather and grandmother's grave with a granite cross as a marker.
They lived in Letchworth and my grandfather's name was William Tye, and my grandmother's name was Rosina. They are buried together and I am wondering if they were buried here. They died in 1920-1922 about, I wonder if their grave marker is still standing.