AN accident on the A339 has slowed traffic coming onto the M4. 

Shortly after 5pm today fire engines were called to the road to the north of Newbury.

Three cars were reportedly involved in an incident, with one lying on its side. 

Bina Donald, a Vodofone employee caught in the traffic on her commute back to Reading, said: "There is a grey van lying on its side and two other cars are stopped. 

"There are fireman all around it but no police."

It is currently unknown how significantly and for how long the crash will affect traffic on the M4.