If you haven't already done so, switch off "Smart set Up" on the homehub. It can cause problems.
If that doesn't help download a Wifi Analyser app for you smartphone or use the free version of inSSider from forum member Keith Beddoe's website here http://forumhelp.dyndns.info/software/insidder.zipIt will show you the wireless channels and which one your Homehub is on. You want to find the channel with the least congestion, ie. least number of users. Once you have that you need to change your homehub onto that channel.See link how to change channel on homehubhttp://bt.custhelp.com/app/answers/detail/a_id/14094