BT Fon signal fails on Home Hub 2

My three years old HH2 has ceased to provide the BT Fon network although my own BB ethernet and wireless connections work fine. The signal outside the house has never been great anyway, but I do use the Fon freebie if we're getting close to our monthly limit. Does the team think my HH2 is on the way out?

Sign in here https://www.bt.com/wifi/secure/status.do?s_cid=con_F...

Opt out of BT fon and then immediately opt back in
This will resend the BT fon setup to your homehub and should reset it up

Worked a treat, everything back to normal. Thank you!