Ok so found my multimeter eventually. so do I just do a continuity test on the neutrals (Blacks) in the socket I want to spur from or is there a better way? Thanks
Do a continuity test on the L,N and CPC ( earth ) to confirm it is a ring final, you may as well do all of them as the sockets off and confirm all three conductors are configured in a ring, not just one, if you get a open circuit on any then further investigation is needed.
You are quite right to spur off a socket. Putting 13 a sockets (especially a double) is bad practice.
OP, when you run up from the socket don't go through any moveable wardrobes as you may like new ones in the future and they will be hard to move with wires inside. Strange comment I know but it's been suggested in the past.
Of course it is not bad practice...... Putting single or double 13A sockets spurred to a ring final is standard. I've already suggested that you stop smoking that stuff.
Not that strange, I've seen cables clipped inside the backs and around wardrobes a few times, same people who put carpet up the sides of bath panels
Let’s correct that. Putting a 13a socket (especially a double) on the lighting circuit is bad practice.
Why? What code would you give it? Dangerous...no Potentially dangerous....no Need improvement....no Electricians that make up work I show the door.
Are you suggesting a scenario from a previous idea of yours that involved putting electric fan heaters on top of a kitchen wall unit pointing downwards again? A TV booster is going to be plugged in. That's all. Or do you think the OP is going to do some baking in the loft and as soon as the Kenwood blender is called into action, all the lights will go out?
Some time ago, there was another village idiot on DIYNOT by the name of Winston1. That person also claimed that BS7671 was bad practice, and in particular your highlighted para. Call me suspicious but....... https://www.diynot.com/diy/threads/loft-light-and-sockets-spur.603253/#post-5385360
Add your spur and just put a label on it stating its intended use ' TV Amp Only' and get on with life. Until some genius comes up with an approved connector system for these things to be used in attics its all you can do.