Okay, managed to have someone available in the house to see the OR engineer.
He tested the line and all was okay. Checked from the master socket and the speed was normal. He the replaced the modem and the speeds jumped up to normal. The BQM is also showing this.
The minimum ping has gone from over 30ms to under 10ms. Brother ran an inital speed test and its connected at 34MB.
My brother also heard the engineer mention historic faults on the line though I'm not sure what this meant.
So all in all happy to be back up to speed again.
Conor
There is absolutely no substitute for a genuine lack of preparation
BQM