THE price of Brent crude oil has hit its highest price in four years, as fears grow over US sanctions on crude exports from Iran.

The oil price rose to $80 per barrel – the highest it has been since November 2014.

Patrick Pouyanne, the CEO of French oil giant Total, was among those predicting that oil could reach $100 per barrel within months.

He said: "We are in a new world. We are in a world where geopolitics are dominating the market again.

"Opec and Russia have been implementing their policies efficiently. And on top of it, you have the announcement on Iran, which is pushing the price up.

"So I wouldn't be surprised to see $100 per barrel in the coming months."

Brent hit a low of $27.88 per barrel on January 20, 2016, and has risen dramatically since then.

As well as sanctions by Donald Trump's adminstration aimed at Iran, there is the possibility of the US introducing measures targeting Venezuela's oil industry, with political and economic pressures already reducing output there.

The resulting boost to the oil price pushed the FTSE 100 to a record close of 7787.97.

Meanwhile, Iran has signed an agreement with a British consortium to develop an oil field in the country's south, according to state TV.

The agreement is the first between Iran and a key Western ally of the US since Washington last week announced it will pull out of the landmark 2015 nuclear deal between Tehran and Western powers.

Colin Rowley, the managing director of Pergas International Consortium, and Bijan Alipour, head of National Iranian South Oil Co, signed a preliminary deed on the partnership in the presence of British ambassador Rob Macaire in Tehran.

If the agreement turns into a contract, the project will require more than a billion dollars (£740 million) to produce 200,000 barrels of crude oil per day during the next decade in the 55-year-old Karanj oil field.

The field currently produces 120,000 barrels per day.