Nothing (apart from never turning the power off) seems to guarantee it stays connected without interruption. It will always disconnects daily if i turn the power off at the wall as i like to do before i go to sleep at night.
The system runs nearly default , apart from the lease time has been set to 2 days, and smart settings is off.
I took a few screen grabs of the minute it last disconnected on if this helps identify why its doing this almost daily
BT hub details:
Indeed. It absolutely should be left powered up 24/7, to not do so could cause the automatic line management to think a fault has occurred.
Leave it powered all time. Weekly or fortnightly 'soft' resets that occur automatically are widely reported on the HH6 so do not worry if you catch one of those.
OK I wil keep it turned on.
I have been doing so these last few days since I made this post and Ive not noticed any disconnects so you may be right