My son and I have recessed a wireless charger module into wood. The wood was made of lamination like thick veneer so the coil was only about 3mm below the surface. That worked fine. It's the top of a speaker in which we also put a Bluetooth power amp module and power supply. So it charges the phone while playing music through the speaker.
I always use a sled for cross cutting on the table saw. If you don't then pushing on the wood can cause it to bind on the saw blade. The sled pushes on the wood evenly right upto the blade so the cut doesnt tend to close up.
Watch out at doors between rooms. Should have movement/expansion joints there. Each area of screed can shrink towards it's own centre cracking where the meet. Has happened to us.
No.
In theory it is possible for planning permission to be cancelled but it virtually never happens because the council are liable for damages. Would certainly never happen in a situation like yours.
I suspect the BCO may want a ball 450mm in diameter to fit through it. Not literally (that's not in the regs) but by measurement.
We have a window a fraction too narrow but the BCO allowed it provided we fitted a thicker more fire rated door to that room.
Google says..
Minimum Dimensions: Both the clear opening width and height must be at least 450mm.
Total Area: The clear openable area must be at least 0.33m^2. If you make the opening width the minimum 450mm, the height must be at least 735mm to 750mm to hit the area required.
Height: The bottom of the openable area should be no more than 1,100mm (1.1m) above the internal floor level for safe access.