Surely his high point (apart from the fact that we could enjoy schoolboy sniggers at his initials, which were rude) was his appearance on the Bonzo Dog Doo-Dah Band's The Intro and the Outro :
"We welcome Val Doonican as himself." "Hullo there, Oh! Hullo there."

In such good company as "Big hello to Big John Wayne, xylophone", and "Looking very relaxed, Adolf Hitler on vibes."