Google, it seems, loves Wallace and Gromit as much as the rest of the world. Today marks the 20th birthday of the first public airing of Nick Park's irrepressible plasticine duo and Google UK has honoured their achievement with a homepage illustration. Park unveiled Wallace and Gromit to an unsuspecting public on this day in 1989 at an animation festival at the Arnolfini gallery in Bristol. Their public debut was the 22-minute romp A Grand Day Out, later broadcast by the BBC - and so a UK institution was born.