how to fill large hole in an internal wall

how to fill large hole in an internal wall using a core which was cut out from a thermolite block, using a core drill. The hole in this wall was particularly large, as it was where a vent had been removed, so the hole was about 6 inches in diameter. A core was cut from a thermolite (aerated concrete block) and this was used to fill the hole, before the top surface was filled. I have done similar videos in the past, which might help people-

Gyproc Easi-fill-
Repair a crack in plaster-
Plaster a wall or fill and sand-
How to use a core drill-
Repair minor wall damage-

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