He's in wonderful voice and (as one might imagine) energetically lively. Impressive, nonetheless, given that his stage debut was 40 years earlier, in Half a Sixpence in 1963 (which my parents saw and brought the cast album back). In fact, he's still playing the role, reviving the stage musical during every Christmas season -- and indeed toured the country with it again and played West End as recently as last Christmas 2012, at the age of 75. No doubt a spry and lively 75.
The video also includes some chat with the telethon's hosts. And so, here's the whole thing -- teeth and smile and all.