This isn't about kettle leads hence the new thread instead of getting mixed up in the other discussion.
(FWIW I don't have any faith in "audiophile" kettle leads, but have found that good quality interconnects have a dramatic impact on sound quality, which I believe to be due to their effect on electrical propertiesof the source/pre-amp circuits which they become part of)
I want to put in a new radial main from a dedicated circuit breaker in my consumer unit to a new dedicated multi socket in the lounge for my HiFi. The main reason for doing this would be to position a multi wall socket behind the HiFi instead of the current arrangement of long flex across the carpet to a cheap multi block. This is easy to do as I can access the underfloor void to lay the cable, and just need to get an electrician in to mount the circuit breaker and test the circuit; and then only to preserve the Part P certification on my house.
Spin off benefits may be a reduction in interference from all the stuff that currently shares the same ring main with my HiFi.
Would there be any significant benefit of runing some sort of screened cable (eg SWA) instead of a normal flat twin and earth? if so what would be the best solution?