As of the last few days, the connection has been reported as live but with no actual connection. I switched DNS servers to eliminate that. Must admit I haven't looked at stats while disconnected, will do next time.
Data rate fluctuates on reconnection. It was down to 29,999 when the download fell below the 27mbps guarantee.
As you say the difficulty I currently have is getting a drop while BT's service desk is open so they accept a fault. Although I then expect a battle as a power cycle will resolve temporarliy. Then when/if Openreach visit.it will be pot luck as to whether I get someone who is prepared to look at the most likely cause & change something or just immediately close with NFF.
Edited by rbz5416 (Wed 13-Jun-18 13:40:59)