Before he retired from his weekday breakfast programme `` Wake Up to Wogan '' on BBC Radio 2 in 2009 , it had eight million regular listeners , making him the most listened-to radio broadcaster in Europe .
Before he retired from the weekday breakfast programme `` Wake Up to Wogan '' on BBC Radio 2 on 18 December 2009 , Wogan had a regular eight million listeners , making him the most listened to radio broadcaster of any European nation .