HMS Defender, one of the Royal Navy's most advanced warships, has taken up position to support US forces as they carry out air strikes against Islamic State militants.
The Portsmouth-based ship is using its hi-tech air defence weapons to protect US navy aircraft carrier USS George HW Bush and her aircraft as they launch air strikes as part of the international coalition.
The Type-45 destroyer has an air defence radar and Sea Viper missile system which will form part of an "umbrella" of support for the Nimitz class aircraft carrier and its escort ships while they patrol the Gulf and launch air strikes against the terrorist group IS.
Deployed to the Gulf in June 2014, HMS Defender's primary role has been to conduct maritime security operations.
Its task is now is to build an accurate air surveillance picture over the whole of the Gulf in order to guard the US aircraft carrier against possible air attack.
The Archbishop of Canterbury Justin Welby has told ITV News the rise of Islamic State militants is a 'once in a millennium threat'.
A "small specialist team" of British soldiers is training Kurdish forces near the town of Erbil in Iraq, the Ministry of Defence said.
The FBI want help to identify an English-speaking militant captured on a video released by the Islamic State last month.