Twelve engines and about 80 firefighters are battling a large blaze at a childcare centre.

Half of three external buildings belonging to the centre are alight, along with part of the loft of the main school building.

About two hectares of grass at the site in Sandy Lane, Orpington, in surrounding fields are also on fire.

London Fire Brigade is at the scene.

Station Commander Stephen Irvine said: "A grass fire near the childcare centre spread, causing classrooms close by to catch alight.

"The fire is producing heavy smoke and we're urging people in the local area to keep their windows and doors closed until it subsides.

"There are road closures in place causing heavy traffic, so please also avoid the area if possible, whilst we make the scene safe."

The brigade's 999 Control Officers have taken more than 25 calls to the blaze, which started at around 4pm.

Fire crews from Sidcup, Orpington, Bexley, Eltham and surrounding fire stations are at the scene.

The London Ambulance Service attended the scene but was later stood down. No injuries were reported.

The cause of the fire is not known at this time.