The M25 will be closed for a second Saturday night in a row tonight, allowing for a gantry to be installed as party of work to widen the motorway.

The anti-clockwise carriageway will be closed between junction 21a at Bricket Wood to Junction 19 Watford from midnight tonight until 6am on Sunday morning.

Motorway traffic will be diverted via the A405 to the A41. The Highways Agency has warned that those who find it necessary to travel should expect delays, and people living along the diversion route may see extra traffic during the closure.