Learn to hang a neon sign safely, checking your wall type and cabling before you drill or plug anything in.
Not a Part P issue on its own, but always isolate electrics at the consumer unit before drilling if there's any doubt about hidden cables.
Plugging into an existing socket is fine and not notifiable. Hardwiring a sign into fixed wiring, or adding a new socket, counts as electrical work under Part P in kitchens, bathrooms and outdoors, and should be done or checked by a qualified electrician.
Travis Perkins, Tooled Up and Machine Mart links are affiliate links: if you buy after clicking, we may earn a small commission at no extra cost to you. B&Q and Amazon links are plain searches and earn us nothing.
Save this as a project