"We have been advised that part of the garden is currently rented from Leeds City Council" - I'm guessing that's the bit with the grave in it, if so you wouldn't be able to do anything with it as it'd be classed like any other plot in a council cemetery.
(, Tue 19 Jan 2021, 15:30, Reply)
I’d still rather not have a corpse in my back garden, whether the council own the plot or not.
(, Tue 19 Jan 2021, 15:49, Reply)