Highways England has released an advance warning of possible M25 delays near Potters Bar and South Mimms.
Highways England has warned motorists to be wary after issuing an amber warning for the South East.
A fallen tree on the A1(M) between Junction 7 and 8 for Stevenage is causing delays this evening.
Motorists are being warned to expect delays after a crash between South Mimms and Hatfield caused one lane to close on the A1(M).
Emergency services are currently at the scene of a crash on the A1(M) near Welwyn.