Sam's not in today so hope you don't mind me getting back to you instead
My tests from here aren't highlighting any drops in connection so I'd like to clarify a few things, if you don't mind:
You say "Why is my broadband speed soooo slow after midnight?" but the thread title indicates that you "Can't access the Internet after midnight!".
Is the Internet failing to work at all after midnight or do broadband speeds reduce?
Does this affect wired or wireless devices or both?
Would you please reboot your Hub (power it off at the socket and power back on) then access your Hub and post the Log data on here so we can look for any errors: Navigate to 192.168.0.1 in your web browser Don't sign in, just click on Router Status in the top right corner Click on Network Log, copy that data and paste on here