If you can leave the alarm disconnected for the time being (depends on how it's monitored?) then I'd leave the router plugged into the test socket until you get the new faceplate. I'm not sure how quickly the BT system adjusts the profile on a Fibre connection, but leaving in the test socket will give the higher speed for the time being and prevent the BT system reducing the profile.
Superusers are not staff, but they do have a direct line of communication into the business in order to raise issues, concerns and feedback from the community.
