I wonder if it was the 13 August, otherwise what's the point of the date in the following statement?
In reference to bt.custhelp.com/app/answers/detail/a_id/56165/c/346:I got BT Infinity 1 quite recently. How do I get the speed upgrade?
If you ordered BT Infinity after 13 August 2017, we'll uplift your speed if your line can support it. If you ordered Infinity 1 before 13 August 2017 and your line can support the new speed, we'll automatically uplift you.