while running it earlier i also started "resource monitor" - it was barely even registering on my ram or cpu so i checked network.
and sure enough there was a BT cloud storage programme i had forgotten about constantly checking and i think that was causing the issue or at least adding to it .
i have since disabled that programme and streamed for 2 hours 40 minutes after and didn't drop a single frame .
so will leave that disabled and see how it goes .
thanks
dan