Investigators have been unable to find out what caused the blaze at The White Horse pub.

Barking and Dagenham Post: The old White Horse pub in HighRoad, Chadwell Heath, was gutted by fire at the weekend. Picture: Lindsay JonesThe old White Horse pub in HighRoad, Chadwell Heath, was gutted by fire at the weekend. Picture: Lindsay Jones (Image: Archant)

About 40 firefighters fought the flames at the disused watering hole in the High Road, Chadwell Heath on Sunday, September 20.

Most of the historic, locally listed building was destroyed in the fire. There were no reported injuries.

London Fire Brigade (LFB) has confirmed that its investigators have been unable to determine the cause of the blaze because of the severe damage caused.

A bus driver on the road at the time radioed TfL to report that the two-storey building was on fire. TfL then alerted the fire brigade at 4.47am. The fire was under control by 7.17am.

Barking and Dagenham Post: The pub was gutted by fire in the early hours of Sunday, September 20. Picture: Lindsay JonesThe pub was gutted by fire in the early hours of Sunday, September 20. Picture: Lindsay Jones (Image: Archant)

READ MORE: The White Horse pub fire sees 400 years of history ‘go up in flames’An LFB spokesperson said: “Always call 999 first if you see a fire or an emergency situation – so that we can get to it quickly and save lives. Alert other authorities or property owners afterwards.”

Firefighters saw large amounts of smoke on the road as they arrived. Crews from Dagenham, Ilford, Romford, Hainault, Barking and East Ham fought for several hours to extinguish the flames, which spread from a corner of the roof to the rest of the building. Firefighters also used drones to help.

Barking and Dagenham Post: The White Horse had survived for 400 years, but the fire left most of it in ruins. Picture: LBBD Archives/Valence HouseThe White Horse had survived for 400 years, but the fire left most of it in ruins. Picture: LBBD Archives/Valence House (Image: Archant)