(Is it pronounced "spon" or "spoon"? I do hope it's the latter.)
The deceased shares a bunk bed with his or her own decomposing corpse. The corpse has the bottom tier. If you tried to put one in a church today the ecclesiastical authorities would say it was in outrageously bad taste and forbid it.
I think they're fabulous (the tombs not the ecclesiastical authorities).
Sponne was a local good egg. He must have been alarmingly rich. He also gave his home town its grammar school. He died in 1448.
The effigies are made of a chalky stone called clunch- which is easy to carve. Sponne's head and hands are made of wood; they went missing in the 1880s but turned up again a hundred years later in a box in the vicarage attic.
The effigy has been repainted several times. A drawing of 1801 shows Sponne's vestments as black, whereas in 2006 they were reported to be red. In the 1980s someone who didn't know what they were doing went over him with Humbrol enamels- more commonly used for painting model aeroplanes. This will have been his red phase, I think. His present stripped back state is presumably the result of the restoration work that this necessitated.