You had better fill up your tank – because Gravesend has the cheapest petrol prices in the country, according to the AA.

Garages in the town have become the UK’s first to sell unleaded fuel for less than 120p per litre, according to the latest figures.

Petrol prices have plummeted to a four-year low after a fierce battle between supermarkets.

The cheapest place to fill up is currently the Esso branch in Old Road West, where unleaded is going for 119.9p per litre.

As for diesel, the best deal can be found at Asda Greenhithe at 124.7p per litre.

Fuel costs in London and the South East have become the lowest in the UK since the closure of Coryton Refinery in Essex in 2012, which saw a