Got fibre a week ago after having fast broadband (4 to 7 meg).first few days getting 10 meg but since weekend has dropped to 1 or 2 meg.if you you restart router it will go up to 11 or 12 for half hour if your lucky.
I know I am optimization period but surely it shouldn't be that bad
I'm sorry to hear this and I'll take a look now. I've run a test on the line which hasn't detected a fault, however the sync speed does look like it's varying. Is the voice service ok with no noise on the line?
Does your master socket also have a test socket?