Hi all, after a bit of advice. 1950s semi with steel conduit was rewired 25 years ago. Conduit retained in walls, ends de-burred and used to run T&E. CU relocated and changed to 18th edition, by professional sparky 3 years ago. I'm thinking of installing soffit mounted downlights and a POE CCTV system. At the moment I have a 1.5mm2 T&E on a 6A MCB (RCD split load) feeding the 1st floor lights and a couple of florescent tubes in the loft. I'm hoping that the NVR can use a powerline ethernet adaptor to link to my broadband router on the ground floor. Options are: 1. Install a 13A Socket on the 1st floor lighting circuit to power the NVR & POE cameras. I believe that BS7671 permits a 13A docket on 1.5mm2 but obviously there is the risk that a future resident might plug in a heavy load and trip the MCB and be left in darkness. I'm not sure if the powerline signal will like connecting between s lighting and a ring final circuit. 2. Install a new 2.5mm2 radial from a new MCB in the CU to supply the 13A socket in the loft. I think the conduit (3/4"?) Can take both 2.5mm2 and 1.5mm2 T&E but that's getting s bit crowded. 3. As 2 but using 4mm2 T&E to feed a 2.5mm2 T&E ring final in thr loft. 4. As 2 or 3 but use singles instead of the T&E radial to reduce space in conduit then convert back to 2.5mm2 T&E in the loft. Any recommendations or further options appreciated.