THE CAUSE of a large field fire in Sulhamstead remains unknown.

Crews from across Berkshire were called to the area near Wises Fir’s shortly before 1pm on Tuesday.

Teams from Dee Road, Newbury, Caversham Road, Whitley Wood, Maidenhead and Bracknell were all deployed, along with a large off-road water carrier.

The emergency services spent several hours tackling the inferno and establishing the source of the fire.

A Thames Valley Police spokesman added: "We were called to a report of a fire on Wise’s Firs in Sulhamstead just after 1pm today.

"Royal Berkshire Fire and Rescue Service contained the fire and are working with police to establish the cause.

"Wise’s Firs road is currently closed."