I was going to suggest running a cable, and like you say, fibre would be better than a CAT cable, especially if drilling holes are required. I had to rerun all

I was going to suggest running a cable, and like you say, fibre would be better than a CAT cable, especially if drilling holes are required. I had to rerun all our cables after the company that did the trunking in the wall used a cheap CAT cable which was picking up interference from the mains power cables in the wall.