I doubt any of these "EU bans" are true. What happens is that they just stop buying it directly from Iran. The same Iranian gas is bought through intermediaries for a cheaper price. Basically EU is using nuclear dossier as an excuse to get their hands on the same merchandise for a cheaper price! They tried the same approach on Iranian oil. When it didn't workout we started to hear US giving "temporary exemptions" for trading with Iran to the same European countries who were behind sanctions. The truth is that these countries don't care about peace in Israel nor the Iranian people.
Public Security Minister Erdan considers outlawing Jewish extremist organization Lehava (Haaretz)
from the article: Diplomats: EU poised to impose ban on imports of Iranian gas