A lesson learned.
The grave reference I gave for Burngreave Cemetery applies to 2 sections, General and Consecrated.
My grandparents are in one section and the 2 Wardle individuals who at first I thought were buried alongside them, are in another section.
Worth making a note for those of you with an interest in Burngreave Cemetery
Now if I had been smart, I would first have had a look at a map of that cemetery and seen that the same grave reference appeared in both sections !