Aha! I was right!en.wikipedia.org/wiki/Matt_Berry
'Matt provides the voice of George the volcano in Volvic mineral water's April/May 2007 UK adverts'
('Matt provides the voice of George the volcano in Volvic mineral water's April/May 2007 UK adverts'
Weetobix,
Thu 24 May 2007, 12:00,
archived)