I'm not sure it's BT or somebody else. Traceroute says there are 20 devices my connection is going through. Somebody working for ISPs or Bitbucket could confirm

I'm not sure it's BT or somebody else. Traceroute says there are 20 devices my connection is going through. Somebody working for ISPs or Bitbucket could confirm why some sites are fast, others are slower after a minute, I can only guess.