The atheist posters are the idea of the British Humanist Association (BHA) and have been supported by prominent atheist Professor Richard Dawkins.
The BHA planned only to raise £5,500, which was to be matched by Professor Dawkins, but it has now raised more than £36,000 of its own accord.
It aims to have two sets of 30 buses carrying the signs for four weeks.
The complete slogan reads: “There’s probably no God. Now stop worrying and enjoy your life.”
Richard Dawkins states:
This campaign to put alternative slogans on London buses will make people think - and thinking is anathema to religion
We have been seeing stories in the news here and there about the atheist billboards popping up around the country, thanks to groups like the Freedom From Religion Foundation, but we need to do more to let other atheists know that they are not alone and to let them know and especially let the believers know that there are more of us non-believers than they realize.