Strait of Hormuz
HMS Duncan has joined HMS Montrose to help British-flagged ships.
The government is looking at its options as an audio recording emerges of the moments HMS Montrose was seized in the Strait of Hormuz.
Oil and gas prices will be affected if tensions in the area continue, according to a leading authority on British shipping.
Iran’s Revolutionary Guard said on Friday it has seized two oil tankers - one British-flagged and the other British owned.
Iran’s Revolutionary Guard corps made the claim on Friday evening.
An Iranian official suggested the US shot down one of their own drones by mistake
It's the latest escalation in a tense standoff between Washington and Tehran.
Three Iranian vessels tried to block the passage of an oil tanker through the Strait of Hormuz, but withdrew after warnings from a British warship, the UK government said. The stand off followed a warning by Donald Trump that US sanctions on Iran would soon be "substantially" increased as part of his drive to curb Iran's nuclear activities and regional behaviour.
Foreign Secretary Jeremy Hunt said he will unveil diplomatic and economic measures on Monday, but what sparked the incident?
Iran shoots down US drown amid mounting tension since Trump imposed sanctions over the country's nuclear programme.
The US have accused Iran of attacking two oil tankers near the strait of Hormuz. The US military's Central Command released a video it says shows Iranian forces removing an unexploded mine from one of the ships before the attack. Iran has denied involvement amid heightened tensions between the two countries.
Iran has announced it is cutting oil exports to six European countries ahead of sanctions imposed by the EU. State TV said
For the first time, Iran has loaded nuclear fuel rods made on Iranian soil into a research reactor at a ceremony attended
The US aircraft carrier Abraham Lincoln has sailed through the politically sensitive Strait of Hormuz, close to the Iranian
Iran is ready to halt oil exports to the EU before sanctions over its nuclear programme can be imposed, the country's parliament
The recent EU oil embargo against Iran follows the news that Britain, America and France are sending warships through the Strait of Hormuz, which Iran had threatened to close in response to growing sanctions.
William Hague told MPs there was "grave concern" about the actions of the Iranian government as a Conservative MP claimed
David Cameron, Angela Merkel and Nicolas Sarkozy have issued a statement amid EU oil sanctions imposed against Iran today
If there is one thing guaranteed to have heated up the recent exchanges between the US and Iran, it is the issue of oil. As the US pressed for stricter sanctions against Tehran's attempts to press ahead with its nuclear programme, so Iran retaliated with a threat to close the Strait of Hormuz.
Tehran has issued a warning to Gulf nations against boosting oil production as Europe and the US attempt to shore up supplies