William Hague defends Iran nuclear deal
25 November 2013 Last updated at 16:50 GMT
Britain is defending an international deal with Iran designed to limit its nuclear programme, but insists it is only a "first step".
In return for some sanctions being eased, the government in Tehran has agreed to curb its nuclear activities for six months.
The Foreign Secretary William Hague told the Commons that it would have been a "grave error" not to sign the agreement.
The move was welcomed by his Labour shadow Douglas Alexander.