Wifi connectivity problems

Hi I noticed on my phone my internet which is with BT home hub 4 seemed to reboot as lost connection and had to forget network and re type password to reconnect... Went to my MacBook pro which is around 6 months old and lost connection on there too,, couldn't reconnect tried restarting it, turned off wifi, forgot the network, now to connect it asks for the wifi password and everytime I type it in it just says connection timeout after trying to join for about 20 seconds every time,, obviously must be something simple but can't figure it out!!! Thanks for any help. Also when I try to do it via network setup assistant it says the wifi password is invalid,, when it's not