Found out how to start a thread ☺.
Long story but short version to start.
Was working with Talktalk last few days to improve router link speed which has degraded to a static 23-24Mbps on any datastream.
Last night I lost connection intermittently on the 2.4GHz link. The 2.4GHz link has a strong signal but will not connect.
Only the 5GHz and wired connection work.