Welcome to this user forum.
Is there any noise on your phone calls? Dial 17070 and select option 2, there should be no noise between the announcements.
did you turn off smart setup?
can you post some stats advanced settings then technical log information
do you have a filtered master socket and connecting hub direct to master - no telephone extension wiring used?
There was but this was reported and cleared prior to the first engineer visit. The line is silent now. Every time they run a test the broadband connects as it should then maybe an hour later it drops again.
There is probably an intermittent high resistance fault.
What does your master phone socket look like?
smart setup can cause problems and best turned off just wish BT would delete from hub
Socket is the one bottom right, open reach with curved top.
That is the new one,
What I would suggest that you try, just to eliminate a possible faulty socket, is to unclip the front section and try the test socket. Plug the microfilter into there, leave it for a couple of days to see if you still get the flashing purple light and disconnections.