I never regularly listened to Terry Wogan - I found his tones a little too dolcit in the mornings. Not a good way to try and wake up :)
Chris Evans when he was on the Radio 1 breakfast was a disaster. The most unfunny radio show that has ever existed, however, his drive time show on Radio 2 showed that he has matured very significantly in the last few years. I think he can do it and might well tune in sometime this week.