All lanes have reopened after an accident this morning on the A1.

The road was blocked with heavy traffic this morning due to an accident involving at least one vehicle.

There were delays on the A1 Barnet By-Pass Northbound between the A5135 at the Borehamwood and Holiday Inn Turn Off and M25 J23 / A1(M) J1 and A1081 St Albans Road and Bignells Corner South Mimms.

This has also caused congestion up to A411 Barnet Lane and Stirling Way in Stirling Corner.

The road was blocked less than a mile after the Borehamwood turn off at around 6.35am but all lanes have been re-opened.

It is not yet known if anyone is injured.