Best Practice Guidelines

Grave Floors

Remove weeds
Remove and/or poison tree roots.
Cut and lay weedmat
over with sympathetic stones (not road or drainage gravel)

Concrete covered
If broken remove all of the cover material.
Fill in and compact cavities with crusher run gravel.
Level and fill with 100mm concrete screeded level with fall to drain hole.
Plaster to match
Aim to end up with the shape of the original structure preserved.