The Foreign Office has tweeted that it will be pushing for a resolution to freeze the assets of the Islamist group ISIL when the UN Security Council meets tonight.
The Foreign Office has advised against all travel to the areas of Iraq "affected by recent fighting", including the Kurdistan Region.
"Those British nationals already present in the Kurdistan Region should take precautions to remove themselves from areas close to the conflict," the travel advice reads.
The Foreign Office has also advised against "all but essential travel" to the rest of Iraq.
The family of a British man who has been released after being held hostage in Yemen have asked for privacy as they wait to be reunited.
A Foreign Office spokesman said Mike Harvey was released after the Yemeni government engaged with tribal intermediaries.
He added: "We are grateful to the government for their efforts and support."
The teacher was abducted on his way from an educational institute on February 12.
British national Mike Harvey has been safely released after being held hostage in the Yemeni capital Sanaa since February, the Foreign Office has said.
The Foreign Office said it was only recently discovered that records of flights passing through an overseas territory used by the US for extraordinary rendition had been lost to "water damage".
A spokeswoman said:
The British Indian Ocean Territory administration is responsible for records of flights on Diego Garcia and they are investigating the full extent of the damage, how many records and what information is affected.
The damage was only recently discovered so it is unknown how exactly or when it occurred.
Legal charity Reprieve has claimed it is "looking worse and worse for the UK Government on Diego Garcia", after the Foreign Office was accused of a cover-up over records that were lost due to "water damage".
Reprieve represents Libyan dissident Abdel Hakim Belhadj, who claims he was on a rendition flight through Diego Garcia.
Director Cori Crider said: "First we learn the Senate's upcoming torture report says detainees were held on the island, and now - conveniently - a pile of key documents turn up missing with 'water damage'?
"The Government might as well have said the dog ate their homework. This smacks of a cover-up. They now need to come clean about how, when, and where this evidence was lost."
The Foreign Office has been accused of a cover-up after records of flights passing through an overseas territory used by the US for extraordinary rendition had been lost to "water damage".
The US has admitted using Diego Garcia for flights as part of its extraordinary rendition programme for terror suspects on two occasions in 2002.
Foreign Office Minister Mark Simmonds told MPs that only "limited records" for 2002 were available, due to the damage the files had suffered.
The disclosure that records had been lost came in response to a question from Tory MP Andrew Tyrie, the chairman of the all-party parliamentary group who requested a list of flights which passed through Diego Garcia from January 2002 to January 2009.
The Foreign Office have said they are putting more pressure on the Sudanese government to release Meriam Ibrahim, who was sentenced to death for marrying a Christian man in the country.
Mark Simmonds, Minister for Africa, has said the UK government wants the appeals process in Khartoum "sped up".
Simmonds also said that Meriam should be released from prison on "medical grounds" after giving birth.
The Foreign Office is investigating reports that two Britons have died fighting in Syria.
The pair are believed to have been fighting for the Islamic State in Iraq and the Levant (ISIS), an Islamist group linked to al-Qaeda.
A Foreign Office spokesman said: "We are aware of reports and are looking into them."