THE London-bound A13 entrance slip at Junction 30 of the M25 is closed after two lorries collided.
One, an articulated lorry carrying rolls of newsprint crashed with another lorry shortly after 11.30pm.
The incident caused a spillage of diesel.
The slip road is expected to remain closed for three hours while recovery work takes place.
Paramedics were called to the scene but no injuries have been reported.
Delays in the area are being compounded by an overturned lorry near Lakeside shopping centre.
The roads are expected to remain congested until 3pm while both accidents are cleared.