Yet another speed issue posting

Question

Dear BT Bods,
I don't know why having subscribed BT Infinity on the promise of better speed and stability that I now find niether to be the case, and beginning to regret ever buying it.
So to cut the chase, and save your time and mine, I am a senior architect working for the core network of a very large UK and global operator, so spare me the script and the brush overs.
I live in Greenford, postal code area UB6 8xx.
The service is painfully slow, and utter rubbish when it comes to streaming anything, and that's nothing to say of the 75Mb/25Mb speed check I did prior to ordering the line.
To cut a very long story short: I have just paid my first bill, and unless the is sorted immediately, then I am going to formally write to you to disconnect the service, and I don't care what the Ts&Cs say - we can always tango in court if it comes to that. I will not be bullied into a 1-year (dis)service.

Answer 1

Probably worth running the speedtest at http://speedtest.btwholesale.com/ and after the test choose ‘Further Diagnostics’ and post the speeds and the profiles that this gives.  The mods will want to see this anyway when they get time to process your issue.
I assume you are running over ethernet, not wireless?  You could try ruling out HomeHub issues by making a direct PPPoE connection from your computer to the modem (user: [email protected], password: bt will work).
Check the telephone ciruit has not been star wired: with extensions coming off junction boxes between the incoming telephone line feed and the master socket.  That's a fairly common mistake than can lead to instability.
Don't forget that the service guarantees for domestic broadband are very different from those expected for the core network of a very large UK and global operator.  However, for most people Infinity does provide a fast and very stable connection.