Multicore cable

Hi all interested in thoughts on this setup.
In order to limit a complicated long cable run from one section of my house I have roughed in cables to where a sub board will be placed. I’m considering now instead of putting cbus dimmers and relays in there that I put terminals and connect everything to a multicore. Then run the single multicore to the main board where it would connect to the dimmers and relays instead.

my brother the electrician doing the install was unsure if the shielding on the multicore cable might cause an issue?

so to clarify I’m going from lights to 1.5tps to terminal to shielded 1.5mm multicore to dimmers/relays

thanks for your thoughts guys

 

What type of mains rated, multicore cable are you using that's shielded and why?

 

seriously if you are worried about cable runs just use DALI lights and have no DIN relays or dimmers? just run a dali twin to each light - ultimate flexibility of re-switching any light by programming, only