.... Men can divorce their wives unilaterally by pronouncing talaq three times either consecutively or on three separate occasions depending on the Islamic school of thought by which the married couple abide.
Although the husband is able to divorce his wife unilaterally without involving a Sharia council, the husband and/or the wife may apply to the Sharia council for an Islamic talaq certificate, which can be used as evidence that the couple are now divorced.
Unlike men, women cannot unilaterally divorce their husbands. As a result 98% of Islamic divorce petitioners at Birmingham Central Mosque are women. [Family Law Week] Read more [via National Secular Society]