We have a GET IP66 weatherproof socket outside the kitchen, and I am hoping to take a spur of that socket to run a redundant junction box (to be used for later), a set of deck lights, and a couple of wall lights (3 spurs in all).
Electricians often make things look easy, simply because of the years of training and experience, in your case I strongly recommend you call an electrician to do the job safely for you as it is not as easy as you seem to think.
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