Firefighters have put out a large blaze in the middle of heathland.

The fire, which measured around 100 metres long and 100 metres wide, broke out yesterday evening on Dartford Heath.

Seven fire engines and a number of support vehicles, including multi-terrain vehicles, were called at 9.43pm.

The fire service said efforts to extinguish the flames lasted for more than two hours and crews stood down at about 12.15am.

A spokesman said the cause is not yet known and advice has now been issued as further warm weather is expected over the coming weeks.

They said: "With warm temperatures set to continue, people can help to prevent grass fires by keeping bonfires to a manageable size, well clear of greenery and property, always supervise the burning and avoid having one when it’s windy.

"It’s courteous to let your neighbours know if you plan to have one too.

"Disposing of smoking materials responsibly, making sure they’re fully stubbed out and cold before being binned - consider using a portable ashtray when on the go.

"When cooking on a disposal barbecue put it on a flat, non-flammable surface, away from property and greenery, and only place in a bin once fully cool."

The blaze follows a large fire on the heath last month, which was brought under control after firefighters battled for 13 hours from Tuesday July 19 to Wednesday July 20.

If anyone sees a grass fire, move to a safe area and call 999.