Still with the original router, here are todays tests.
Link speed : 57.7 & 16.5
Speed test : 46.4Mb & 15.7Mb
Ill let you know when the 2nd router arrives and do a test a couple of minutes after switching it on.
Thanks for trying this and I'm sorry to hear that there has been no further improvement in speed. As the speed is within the predicted range for the line then an engineer may not be able to increase this any further. Are you experiencing any issues with the overall performance of the connection?
If the line was syncing slightly better with the previous router then it would be worth swapping this back over again.