Hi
You are entitled to be buried in the parish you are living in at the time of your death. If you own a family plot elsewhere then you can be buried elsewhere wherever you own a plot but if you don't own a grave then it is down to the Vicar.
And this especially comes into play if your ancestor was poor ,had just been nursed in the Workhouse and was parish relief.The Parish is going to have to pay for your funeral and grave.They are not likely to be keen to pay extra to transport the coffin to another graveyard in a different parish.
It may depend how pushy your grieving relatives are and how willing they are to contribute to the cost.
If one of the couple died quite early on and was buried by their grieving spouse ,with all the family around and the other lived into their 80s with most of the family gone ,poor Old MR Smith may be buried at the nearest parish church or cemetery.
My Great Grandmother is buried at the local parish church Christ Church Burntwood in the 1890s. She is in pride of place ,in the family plot, with a space for her husband next to her. Her husband died 40 years latter ,poor and with most of his children gone to the town and was buried at the new Cemetery St Anne's.
If life is tough then the family may have more important things to worry about .
Ciderdrinker