Martin Rowson is a british cartoonist and author whose scathing satirical illustrations have appeared in newspapers like The Guardian, The Independant, The Daily Mirror and the Morning Star. For 8 years his "cheeky Godlessness" has also decorated the covers and interior of New Humanist magazine, voice of the Rationalist Association and one of the world's oldest continuously published magazines (starting life as The Literary Review in 1885, according to NH).
And now, that "cheeky Godlessness" is on exhibet for 3 days in London. I especially like Rowan's version of the Sistine Chapel ceiling. More here.