Just done the job. Been easier than what's advertised..
. Coil plug pulled them out with some cable ties underneath them. NO special tools.
For the rear plugs...
... easiest way is to use a 150mm extension on top of the plug socket. That is all you need. No swivel socket..no swivel adaptors ...no nothing.
I've put the spark plug with socket in the hole... and after i had the extension 150mm in the hole.
I actually used a bit of tape on side of the socket so that i don't actually throw/ drop them in the hole.
On top of those the torque wrench fits perfect as well.....both sides.
This way you have a clean straight angle.
On extracting them....the extension comes out enough to see .. hold and unplug the socket with spark pllug on it...take the extension separated from the plug socket.
All the best.