Stephen Green of Christian Voice has complained to the advertizing Standards Authority about the Atheist Bus Campaign. 800 buses carry an advert saying "There is probably no God. Now stop worrying and enjoy your life."
Green has challenged the adverts on grounds of ‘truthfulness’ and ‘substantiation’, suggesting that there is not ‘a shred of supporting evidence’ that there is probably no god.
See the BHA's response here.
This could be a lot of fun. Suppose Green wins - then the BHA can complain about adverts saying "God loves you" etc. on the very same grounds.