There are regulations as to mixing extra low and low voltage cables in same tray work and in drilling holes in beams to feed cables through but very little as to extra low voltage.
The regulations don't exclude extra low voltage from requirements like RCD protection but I consider this is an error in the regulations as any separated extra low voltage can't be protected by either earthing or RCD.
Regulations as to using fire stop in holes and heights of sockets or displays (Part M) will apply but one is still allowed lift-able floor plates so not easy to work out exactly and Part M can be down loaded like Part P so easy to look up.
DIY how to tutorial projects and guides - Did you know we have a DIY Projects section? Well, if no, then we certainly do! Within this area of our site have literally hundreds of how-to guides and tutorials that cover a huge range of home improvement tasks. Each page also comes with pictures and a video to make completing those jobs even easier!