As a customer of BT Infinity for about 18 months I know that my download speed typically averages 37Mbps.
Recently (three weesk ago) I had an issue with noise on the line which took BT just over a week to fix.
Since then, my speed has reduced to 18Mbps.
Going through the BT wholesale tester I noticed that the IP profile for my line is 19.35Mbps download and 20Mbps upload.
Is it a matter of time for the line speed to increase again or has BT manually set the maximum possible speed that I can download at?