I live near a town centre and often get Wifi with \FOn or BT wifi popping upm ahea dof my own router. Howver main issue is that the Hub 5 is acknowledged by BTa s abit of lemon in some circumstances. One of these is its susceptibility to not recognsing external hubs /hotspots and trying to get you to log in to them. As has been pointed out tis other flaw is channel swapping/hopping and constantly changing th radio channel it uses for Wifi signals.
Solution is geta HH 6 . Much betetr and much less susceptible to these irritating problems. You have to push the customer service people a bit but if you say you have read about the hub 6 and it looks like it will clear my problems you should be lucky with getting it replaced foc
PB