@Spoon sorry about not being clear earlier but that's how most of the buildings in the 2 countries I have lived are. Neither am I a professional (in fact a noob!) and am doing this just for our house. What are ceilings in UK mostly made of? Curious!
Also I thought the initial figure I created specified the requirements clearly and not sure if the material of the ceiling really matters for the solution I am looking for?
No problems mate. See @SJD post above for how the majority if ceiling are built in the UK.
I thought what you were after was going above the ceiling, in the void.
I might eventually end up drilling a hole if nothing works out, but I want to avoid it if I can - mostly because my previous (first) attempt at drilling concrete was disaster.
What problem did you have with your first attempt?