In December 2017 I moved from SKY to BT, just to get BT Sport to watch the Ashes from Aus. What a stupid thing to do. SKY were delivering 10.5mbps but BT started off delivering 6.5mbps which in the last couple of weeks has gone down to 3.5mbps. When I complained BT said they were within the contracted speeds, ie. 1-7mbps. They just weren't interested.
My advice to anyone thinking of moving to BT is DON'T, YOU WILL REGRET IT!!!!!
I am just waiting until the end of my 12 month contract to move back to SKY.