thank you Colin.
I fully apreciate your concern.
I do always turn off at the mains
i was a gas fitter for years (retired now).
I had a few courses many years ago, so have a we bit of knowledge etc. But I didn't take Part P within my ACS exams. Just ACS cost me an arm & a leg.
In answer to your questions...
Yes I did intend to take a spur from the actual box that my router is connected too.
And it is on a ring main, not a spur.
And always do turn off at the mains distribution board.
but it's great that someone like yourself should be concerned enough to look out for dummies like myself.