thanks for your input but now is fixed.
Don't know how or why but this hasn't worked since the fibre install on friday.
Last night it looks like the upload speed has been increased to 10.
Just rebooted the router, guess what... works! lol. thanks anyway though.
Just my experiences couple of days after the migration, I found that when first opening chrome it would often not go to default home page. Found an ipconfig /flushdns fixed this.
Now it seems that the connection has stabilised. All good!!