A couple of years ago I had aYou View TV box, TT then reduced my speed to about half what it was and could not increase i while I had TV service. To fix this I had to reject and return the You View box and my BB recovered.
I was able to use i-player etc with no problems so neve understood why speed was reduced.
I don't want or need fibre. The normal speed I get is fine for my use of the web.
The question I have now is. Have TT fixed this problem so speed is not reduced for users of You View box