No problem Bert, the speed drop is due to the physical link between your router and the cabinet which can be due to a variety of reasons. Openreach won’t investigate because you’re within their expected speed range for your line but try the test socket as that may help.
This is my personal Community Forum account to help out around these parts while I'm at home. If I'm posting from the 1st March 2020, this means I'm off-duty with no access to internal systems.
If this post resolved your issue, please click the 'This fixed my problem' button
