Prime Minister David Cameron on Tuesday recalled Parliament for an urgent discussion and vote on a possible military response to the alleged chemical attack in Syria.
Cameron said the crisis session will be held Thursday, when Parliament would traditionally be on its summer recess. A clear motion will be considered by lawmakers, who have been urging Cameron to consult Parliament before any possible action against Syria.
Cameron's office said that the UK is considering a "proportionate" response that would deter Syrian President Bashar Assad from using chemical weapons in the future.
The decision on the recall came as the military drew up contingency plans for a possible military attack on Syria.
Britain's Ministry of Defense also said that a planned Royal Air Force training mission involving British Typhoon fighter jets has been postponed. The jets were to have been deployed on the Mediterranean island of Cyprus.