What was Basil Brush’s catchphrase?

What was Basil Brush’s catchphrase?

A Yeah!
B Lovely jubbly!
C Boom Boom!

A staple of British children’s television for decades, Basil Brush was designed in 1962 for an ITV television series and was voiced by Ivan Owen until his death in 2000. Owen is said to have modelled his voice on the actor Terry-Thomas. “Lovely jubbly” was Del Boy’s catchphrase, while Roland Rat had a habit of saying “yeah!”.

The correct answer is Boom Boom!.