Looking again at Mary's death certificate her home address was Wood View Renishaw but death address was 12a Newbold Chesterfield. was not aware of the "Polly"
Find a Grave have Polly Mary Ibbotson in Plot 685 Eckington Cemetery. There is also a Frederick 1959 in same plot. So that looks like Fred, but there is no further details attached. Don't think William aged 12 was there son.
Hi Terry
The 1959 Sheffield probate seem to be right because of the name Pugh on the benefactors, so seems he died in Sheffield but was buried with Mary, but will dig a bit more.
That's great Stanley Fold has to be him. Will order death cert. Looks like 12a Newbold Chesterfield was originally a Workhouse then the Public Institution and later Scarsdale hospital. Many thanks
The 1959 Fred Ibbotson of Sheffield was of 11 Jeffcock Road High Green near Sheffield, died 10 January 1959 at the City General Hospital (Probate). I hope this clarifies rather than muddies the picture.