<snip>
Data Rate Down
76555 kbps
Data Rate Up
19999 kbps
MAX Rate Down
96704
MAX Rate Up
31130
<snip>
Looking critically at the latest set of statistics that you have posted, we can see that the circuit would be capable of operating at ~97 Mbps DS and ~31 Mbps US if no profile cap was applied.
As you have purchased the top most tier of the Openreach FTTC product (80/20), we can see that the DSLAM - Modem have negotiated synchronisation at ~77 Mbps DS and ~20 Mbps US. Your expected throughput would be a little less than the latter values. So something, somewhere, is restricting the throughput you receive.
Perhaps it would be worthwhile you running both parts of the
BT Wholesale Broadband Performance Test, ignoring all the instructions displayed in
red on the initial page -- just acknowledge them with a
yes. Capture an image of the screen for the initial results and then take the bottom option to perform a further test. Capture an image of the screen for the second test. Then either post a typed synopsis of each screen or if you have the appropriate software (and ability) to obscure the personal identifiers, just attach both images to your next post to this thread.